diff --git a/doc/modelling/types/README.md b/doc/modelling/types/README.md
index 3ad62fcf6..93525e5ae 100644
--- a/doc/modelling/types/README.md
+++ b/doc/modelling/types/README.md
@@ -99,4 +99,27 @@ class LodataServiceProvider extends ServiceProvider
         Lodata::add($set);
     }
 }
+```
+
+## Immutable properties
+
+Lodata supports annotating a property as `Immutable` meaning that it can be provided as part of a create request, but
+will be ignored during an update request.
+
+```php
+class LodataServiceProvider extends ServiceProvider
+{
+    public function boot()
+    {
+        $entityType = new \Flat3\Lodata\EntityType('example');
+        $entityType->setKey(new \Flat3\Lodata\DeclaredProperty('id', \Flat3\Lodata\Type::string()));
+        $entityType->addDeclaredProperty('name', \Flat3\Lodata\Type::string());
+        $dob = new \Flat3\Lodata\DeclaredProperty('dob', \Flat3\Lodata\Type::date());
+        $dob->addAnnotation(new \Flat3\Lodata\Annotation\Core\V1\Immutable);
+        $entityType->addProperty($dob);
+        $entitySet = new \Flat3\Lodata\Drivers\CollectionEntitySet('examples', $entityType);
+        $entitySet->setCollection($collection);
+        \Lodata::add($entitySet);
+    }
+}
 ```
\ No newline at end of file
diff --git a/src/ComplexType.php b/src/ComplexType.php
index c0b25c48e..ad3043cad 100644
--- a/src/ComplexType.php
+++ b/src/ComplexType.php
@@ -286,12 +286,12 @@ public function getOpenAPIUpdateSchema(): array
     /**
      * Ensure the provided property values are valid against this type
      * @param  PropertyValues  $propertyValues  Property values
-     * @return void
+     * @return PropertyValues
      */
-    public function assertPropertyValues(PropertyValues $propertyValues): void
+    public function assertPropertyValues(PropertyValues $propertyValues): PropertyValues
     {
         if ($this->isOpen()) {
-            return;
+            return $propertyValues;
         }
 
         $properties = $this->getProperties();
@@ -310,26 +310,32 @@ public function assertPropertyValues(PropertyValues $propertyValues): void
                 )
             );
         }
+
+        return $propertyValues;
     }
 
     /**
      * Ensure the provided property values meet the update requirements of the entity type
      * @param  PropertyValues  $propertyValues  Property values
-     * @return void
+     * @return PropertyValues
      */
-    public function assertUpdateProperties(PropertyValues $propertyValues)
+    public function assertUpdateProperties(PropertyValues $propertyValues): PropertyValues
     {
-        $this->assertPropertyValues($propertyValues);
+        return $this->assertPropertyValues($propertyValues)->filter(function (PropertyValue $propertyValue) {
+            return !$propertyValue->getProperty()->isImmutable();
+        });
     }
 
     /**
      * Ensure the provided property values meet the create requirements of the entity type
      * @param  PropertyValues  $propertyValues  Property values
      * @param  PropertyValue|null  $foreignKey  Foreign key value
-     * @return void
+     * @return PropertyValues
      */
-    public function assertCreateProperties(PropertyValues $propertyValues, ?PropertyValue $foreignKey = null)
-    {
+    public function assertCreateProperties(
+        PropertyValues $propertyValues,
+        ?PropertyValue $foreignKey = null
+    ): PropertyValues {
         $declaredProperties = $this->getDeclaredProperties();
 
         $this->assertPropertyValues($propertyValues);
@@ -364,5 +370,7 @@ public function assertCreateProperties(PropertyValues $propertyValues, ?Property
 
             $declaredProperty->assertAllowsValue(null);
         }
+
+        return $propertyValues;
     }
 }
diff --git a/src/Entity.php b/src/Entity.php
index e0392aa65..a2abb6f4b 100644
--- a/src/Entity.php
+++ b/src/Entity.php
@@ -278,7 +278,7 @@ public function patch(Transaction $transaction, ?ContextInterface $context = nul
 
         $propertyValues = $entitySet->arrayToPropertyValues($entitySet->getTransaction()->getBodyAsArray());
 
-        $this->getType()->assertUpdateProperties($propertyValues);
+        $propertyValues = $this->getType()->assertUpdateProperties($propertyValues);
 
         $entity = $entitySet->update($this->getEntityId(), $propertyValues);
 
diff --git a/src/EntitySet.php b/src/EntitySet.php
index 7d18a2b60..1657e4c32 100644
--- a/src/EntitySet.php
+++ b/src/EntitySet.php
@@ -331,7 +331,7 @@ public function response(Transaction $transaction, ?ContextInterface $context =
                 Gate::create($this, $transaction)->ensure();
 
                 $propertyValues = $this->arrayToPropertyValues($this->getTransaction()->getBodyAsArray());
-                $this->getType()->assertCreateProperties($propertyValues, $this->navigationSource);
+                $propertyValues = $this->getType()->assertCreateProperties($propertyValues, $this->navigationSource);
 
                 $transaction->getResponse()->setStatusCode(Response::HTTP_CREATED);
 
@@ -858,7 +858,7 @@ public function processDeltaCreate(Transaction $transaction): Entity
         Gate::create($this, $transaction)->ensure();
 
         $propertyValues = $this->arrayToPropertyValues($this->transaction->getBodyAsArray());
-        $this->getType()->assertCreateProperties($propertyValues, $this->navigationSource);
+        $propertyValues = $this->getType()->assertCreateProperties($propertyValues, $this->navigationSource);
         $entity = $this->create($propertyValues);
         $transaction->processDeltaPayloads($entity);
 
@@ -882,7 +882,7 @@ public function processDeltaModify(Transaction $transaction, Entity $entity): En
 
         $propertyValues = $this->arrayToPropertyValues($transaction->getBodyAsArray());
 
-        $this->getType()->assertUpdateProperties($propertyValues);
+        $propertyValues = $this->getType()->assertUpdateProperties($propertyValues);
 
         $entity = $this->update($entity->getEntityId(), $propertyValues);
 
diff --git a/src/Property.php b/src/Property.php
index 5c0256fd4..c99d506b1 100644
--- a/src/Property.php
+++ b/src/Property.php
@@ -7,6 +7,7 @@
 use Flat3\Lodata\Annotation\Core\V1\Computed;
 use Flat3\Lodata\Annotation\Core\V1\ComputedDefaultValue;
 use Flat3\Lodata\Annotation\Core\V1\Description;
+use Flat3\Lodata\Annotation\Core\V1\Immutable;
 use Flat3\Lodata\Exception\Protocol\BadRequestException;
 use Flat3\Lodata\Exception\Protocol\ConfigurationException;
 use Flat3\Lodata\Helper\Constants;
@@ -411,4 +412,13 @@ public function isComputed(): bool
             $this->hasAnnotation(new Computed, Boolean::true()) ||
             $this->hasAnnotation(new ComputedDefaultValue, Boolean::true());
     }
+
+    /**
+     * Determine whether this property is immutable
+     * @return bool
+     */
+    public function isImmutable(): bool
+    {
+        return $this->hasAnnotation(new Immutable);
+    }
 }
diff --git a/tests/EntitySetCreate/EntitySetCreate.php b/tests/EntitySetCreate/EntitySetCreate.php
index f7d254175..a2bfaa0e8 100644
--- a/tests/EntitySetCreate/EntitySetCreate.php
+++ b/tests/EntitySetCreate/EntitySetCreate.php
@@ -4,6 +4,7 @@
 
 namespace Flat3\Lodata\Tests\EntitySetCreate;
 
+use Flat3\Lodata\Annotation\Core\V1\Immutable;
 use Flat3\Lodata\Controller\Response;
 use Flat3\Lodata\Facades\Lodata;
 use Flat3\Lodata\Tests\Helpers\Request;
@@ -190,4 +191,21 @@ public function test_collection_property()
             Response::HTTP_CREATED
         );
     }
+
+    public function test_creates_with_immutable()
+    {
+        $type = Lodata::getEntitySet($this->entitySet)->getType();
+        $type->getProperty('age')->addAnnotation(new Immutable);
+
+        $this->assertJsonResponseSnapshot(
+            (new Request)
+                ->post()
+                ->path($this->entitySetPath)
+                ->body([
+                    'name' => 'Four',
+                    'age' => 4,
+                ]),
+            Response::HTTP_CREATED
+        );
+    }
 }
diff --git a/tests/EntitySetCreate/FilesystemTest.php b/tests/EntitySetCreate/FilesystemTest.php
index 22387d5f3..15cbd2b31 100644
--- a/tests/EntitySetCreate/FilesystemTest.php
+++ b/tests/EntitySetCreate/FilesystemTest.php
@@ -126,4 +126,9 @@ public function test_collection_property()
     {
         $this->expectNotToPerformAssertions();
     }
+
+    public function test_creates_with_immutable()
+    {
+        $this->expectNotToPerformAssertions();
+    }
 }
diff --git a/tests/EntitySetCreate/KeyedCollectionTest.php b/tests/EntitySetCreate/KeyedCollectionTest.php
index 70ce84b22..78efc1fc4 100644
--- a/tests/EntitySetCreate/KeyedCollectionTest.php
+++ b/tests/EntitySetCreate/KeyedCollectionTest.php
@@ -4,7 +4,9 @@
 
 namespace Flat3\Lodata\Tests\EntitySetCreate;
 
+use Flat3\Lodata\Annotation\Core\V1\Immutable;
 use Flat3\Lodata\Controller\Response;
+use Flat3\Lodata\Facades\Lodata;
 use Flat3\Lodata\Tests\Drivers\WithKeyedCollectionDriver;
 use Flat3\Lodata\Tests\Helpers\Request;
 
@@ -129,4 +131,22 @@ public function test_create_accepts_invalid_property()
             Response::HTTP_CREATED
         );
     }
+
+    public function test_creates_with_immutable()
+    {
+        $type = Lodata::getEntitySet($this->entitySet)->getType();
+        $type->getProperty('age')->addAnnotation(new Immutable);
+
+        $this->assertJsonResponseSnapshot(
+            (new Request)
+                ->post()
+                ->path($this->entitySetPath)
+                ->body([
+                    'id' => 'zeta',
+                    'name' => 'Four',
+                    'age' => 4,
+                ]),
+            Response::HTTP_CREATED
+        );
+    }
 }
diff --git a/tests/EntitySetCreate/RedisTest.php b/tests/EntitySetCreate/RedisTest.php
index afe93e292..1654286c6 100644
--- a/tests/EntitySetCreate/RedisTest.php
+++ b/tests/EntitySetCreate/RedisTest.php
@@ -4,6 +4,7 @@
 
 namespace Flat3\Lodata\Tests\EntitySetCreate;
 
+use Flat3\Lodata\Annotation\Core\V1\Immutable;
 use Flat3\Lodata\Controller\Response;
 use Flat3\Lodata\Facades\Lodata;
 use Flat3\Lodata\Tests\Drivers\WithRedisDriver;
@@ -150,4 +151,22 @@ public function test_create_accepts_invalid_property()
             Response::HTTP_CREATED
         );
     }
+
+    public function test_creates_with_immutable()
+    {
+        $type = Lodata::getEntitySet($this->entitySet)->getType();
+        $type->getProperty('age')->addAnnotation(new Immutable);
+
+        $this->assertJsonResponseSnapshot(
+            (new Request)
+                ->post()
+                ->path($this->entitySetPath)
+                ->body([
+                    'key' => 'zeta',
+                    'name' => 'Four',
+                    'age' => 4,
+                ]),
+            Response::HTTP_CREATED
+        );
+    }
 }
diff --git a/tests/EntityUpdate/EntityUpdate.php b/tests/EntityUpdate/EntityUpdate.php
index 331c4847d..b96814356 100644
--- a/tests/EntityUpdate/EntityUpdate.php
+++ b/tests/EntityUpdate/EntityUpdate.php
@@ -4,6 +4,7 @@
 
 namespace Flat3\Lodata\Tests\EntityUpdate;
 
+use Flat3\Lodata\Annotation\Core\V1\Immutable;
 use Flat3\Lodata\Controller\Response;
 use Flat3\Lodata\Facades\Lodata;
 use Flat3\Lodata\Tests\Helpers\Request;
@@ -394,4 +395,19 @@ public function test_collection_property_delete()
                 ->path($this->entityPath.'/emails'),
         );
     }
+
+    public function test_ignores_immutable()
+    {
+        $type = Lodata::getEntitySet($this->entitySet)->getType();
+        $type->getProperty('name')->addAnnotation(new Immutable);
+
+        $this->assertJsonResponseSnapshot(
+            (new Request)
+                ->path($this->entityPath)
+                ->patch()
+                ->body([
+                    'name' => 'Alph',
+                ])
+        );
+    }
 }
diff --git a/tests/__snapshots__/EntitySetCreate/EloquentTest__test_creates_with_immutable__1.json b/tests/__snapshots__/EntitySetCreate/EloquentTest__test_creates_with_immutable__1.json
new file mode 100644
index 000000000..eefb504a5
--- /dev/null
+++ b/tests/__snapshots__/EntitySetCreate/EloquentTest__test_creates_with_immutable__1.json
@@ -0,0 +1,15 @@
+{
+    "@context": "http://localhost/odata/$metadata#Passengers/$entity",
+    "id": 6,
+    "flight_id": null,
+    "name": "Four",
+    "dob": null,
+    "age": 4,
+    "chips": null,
+    "dq": null,
+    "in_role": null,
+    "open_time": null,
+    "colour": null,
+    "sock_colours": null,
+    "emails": []
+}
diff --git a/tests/__snapshots__/EntitySetCreate/EloquentTest__test_creates_with_immutable__2.txt b/tests/__snapshots__/EntitySetCreate/EloquentTest__test_creates_with_immutable__2.txt
new file mode 100644
index 000000000..1d96d45b2
--- /dev/null
+++ b/tests/__snapshots__/EntitySetCreate/EloquentTest__test_creates_with_immutable__2.txt
@@ -0,0 +1,21 @@
+@@ @@
+             "colour": null,
+             "sock_colours": null,
+             "emails": null
++        },
++        {
++            "id": 6,
++            "flight_id": null,
++            "name": "Four",
++            "dob": null,
++            "age": 4,
++            "chips": null,
++            "dq": null,
++            "in_role": null,
++            "open_time": null,
++            "colour": null,
++            "sock_colours": null,
++            "emails": null
+         }
+     ],
+     "pets": [
diff --git a/tests/__snapshots__/EntitySetCreate/KeyedCollectionTest__test_creates_with_immutable__1.json b/tests/__snapshots__/EntitySetCreate/KeyedCollectionTest__test_creates_with_immutable__1.json
new file mode 100644
index 000000000..180b98f0b
--- /dev/null
+++ b/tests/__snapshots__/EntitySetCreate/KeyedCollectionTest__test_creates_with_immutable__1.json
@@ -0,0 +1,15 @@
+{
+    "@context": "http://localhost/odata/$metadata#passengers/$entity",
+    "id": "zeta",
+    "name": "Four",
+    "age": 4,
+    "dob": null,
+    "chips": null,
+    "dq": null,
+    "in_role": null,
+    "open_time": null,
+    "flight_id": null,
+    "colour": null,
+    "sock_colours": null,
+    "emails": []
+}
diff --git a/tests/__snapshots__/EntitySetCreate/KeyedCollectionTest__test_creates_with_immutable__2.txt b/tests/__snapshots__/EntitySetCreate/KeyedCollectionTest__test_creates_with_immutable__2.txt
new file mode 100644
index 000000000..ffa25f804
--- /dev/null
+++ b/tests/__snapshots__/EntitySetCreate/KeyedCollectionTest__test_creates_with_immutable__2.txt
@@ -0,0 +1,11 @@
+@@ @@
+         "in_role": 888.9,
+         "colour": null,
+         "sock_colours": null
++    },
++    "zeta": {
++        "id": "zeta",
++        "name": "Four",
++        "age": 4
+     }
+ }
diff --git a/tests/__snapshots__/EntitySetCreate/MongoTest__test_creates_with_immutable__1.json b/tests/__snapshots__/EntitySetCreate/MongoTest__test_creates_with_immutable__1.json
new file mode 100644
index 000000000..4666e5097
--- /dev/null
+++ b/tests/__snapshots__/EntitySetCreate/MongoTest__test_creates_with_immutable__1.json
@@ -0,0 +1,15 @@
+{
+    "@context": "http://localhost/odata/$metadata#passengers/$entity",
+    "name": "Four",
+    "age": 4,
+    "_id": "four",
+    "dob": null,
+    "chips": null,
+    "dq": null,
+    "in_role": null,
+    "open_time": null,
+    "flight_id": null,
+    "colour": null,
+    "sock_colours": null,
+    "emails": []
+}
diff --git a/tests/__snapshots__/EntitySetCreate/MongoTest__test_creates_with_immutable__2.txt b/tests/__snapshots__/EntitySetCreate/MongoTest__test_creates_with_immutable__2.txt
new file mode 100644
index 000000000..6b47402f0
--- /dev/null
+++ b/tests/__snapshots__/EntitySetCreate/MongoTest__test_creates_with_immutable__2.txt
@@ -0,0 +1,11 @@
+@@ @@
+         "in_role": 888.9,
+         "colour": 0,
+         "sock_colours": 0
++    },
++    {
++        "_id": "four",
++        "name": "Four",
++        "age": 4
+     }
+ ]
diff --git a/tests/__snapshots__/EntitySetCreate/NumericCollectionTest__test_creates_with_immutable__1.json b/tests/__snapshots__/EntitySetCreate/NumericCollectionTest__test_creates_with_immutable__1.json
new file mode 100644
index 000000000..5d59e0dcc
--- /dev/null
+++ b/tests/__snapshots__/EntitySetCreate/NumericCollectionTest__test_creates_with_immutable__1.json
@@ -0,0 +1,15 @@
+{
+    "@context": "http://localhost/odata/$metadata#passengers/$entity",
+    "name": "Four",
+    "age": 4,
+    "id": 5,
+    "dob": null,
+    "chips": null,
+    "dq": null,
+    "in_role": null,
+    "open_time": null,
+    "flight_id": null,
+    "colour": null,
+    "sock_colours": null,
+    "emails": []
+}
diff --git a/tests/__snapshots__/EntitySetCreate/NumericCollectionTest__test_creates_with_immutable__2.txt b/tests/__snapshots__/EntitySetCreate/NumericCollectionTest__test_creates_with_immutable__2.txt
new file mode 100644
index 000000000..597022fa1
--- /dev/null
+++ b/tests/__snapshots__/EntitySetCreate/NumericCollectionTest__test_creates_with_immutable__2.txt
@@ -0,0 +1,10 @@
+@@ @@
+         "in_role": 888.9,
+         "colour": null,
+         "sock_colours": null
++    },
++    {
++        "name": "Four",
++        "age": 4
+     }
+ ]
diff --git a/tests/__snapshots__/EntitySetCreate/RedisTest__test_creates_with_immutable__1.json b/tests/__snapshots__/EntitySetCreate/RedisTest__test_creates_with_immutable__1.json
new file mode 100644
index 000000000..2465f76fa
--- /dev/null
+++ b/tests/__snapshots__/EntitySetCreate/RedisTest__test_creates_with_immutable__1.json
@@ -0,0 +1,15 @@
+{
+    "@context": "http://localhost/odata/$metadata#passengers/$entity",
+    "key": "zeta",
+    "name": "Four",
+    "age": 4,
+    "dob": null,
+    "chips": null,
+    "dq": null,
+    "in_role": null,
+    "open_time": null,
+    "flight_id": null,
+    "colour": null,
+    "sock_colours": null,
+    "emails": []
+}
diff --git a/tests/__snapshots__/EntitySetCreate/RedisTest__test_creates_with_immutable__2.txt b/tests/__snapshots__/EntitySetCreate/RedisTest__test_creates_with_immutable__2.txt
new file mode 100644
index 000000000..5f6a5c987
--- /dev/null
+++ b/tests/__snapshots__/EntitySetCreate/RedisTest__test_creates_with_immutable__2.txt
@@ -0,0 +1,10 @@
+@@ @@
+         "in_role": 888.9,
+         "colour": null,
+         "sock_colours": null
++    },
++    "zeta": {
++        "name": "Four",
++        "age": 4
+     }
+ }
diff --git a/tests/__snapshots__/EntitySetCreate/SQLTest__test_creates_with_immutable__1.json b/tests/__snapshots__/EntitySetCreate/SQLTest__test_creates_with_immutable__1.json
new file mode 100644
index 000000000..75ccae2fe
--- /dev/null
+++ b/tests/__snapshots__/EntitySetCreate/SQLTest__test_creates_with_immutable__1.json
@@ -0,0 +1,15 @@
+{
+    "@context": "http://localhost/odata/$metadata#passengers/$entity",
+    "id": 6,
+    "name": "Four",
+    "age": 4,
+    "dob": null,
+    "chips": null,
+    "dq": null,
+    "in_role": null,
+    "open_time": null,
+    "flight_id": null,
+    "colour": null,
+    "sock_colours": null,
+    "emails": []
+}
diff --git a/tests/__snapshots__/EntitySetCreate/SQLTest__test_creates_with_immutable__2.txt b/tests/__snapshots__/EntitySetCreate/SQLTest__test_creates_with_immutable__2.txt
new file mode 100644
index 000000000..1d96d45b2
--- /dev/null
+++ b/tests/__snapshots__/EntitySetCreate/SQLTest__test_creates_with_immutable__2.txt
@@ -0,0 +1,21 @@
+@@ @@
+             "colour": null,
+             "sock_colours": null,
+             "emails": null
++        },
++        {
++            "id": 6,
++            "flight_id": null,
++            "name": "Four",
++            "dob": null,
++            "age": 4,
++            "chips": null,
++            "dq": null,
++            "in_role": null,
++            "open_time": null,
++            "colour": null,
++            "sock_colours": null,
++            "emails": null
+         }
+     ],
+     "pets": [
diff --git a/tests/__snapshots__/EntityUpdate/EloquentTest__test_ignores_immutable__1.json b/tests/__snapshots__/EntityUpdate/EloquentTest__test_ignores_immutable__1.json
new file mode 100644
index 000000000..245dfed27
--- /dev/null
+++ b/tests/__snapshots__/EntityUpdate/EloquentTest__test_ignores_immutable__1.json
@@ -0,0 +1,18 @@
+{
+    "@context": "http://localhost/odata/$metadata#Passengers/$entity",
+    "id": 1,
+    "flight_id": 1,
+    "name": "Alpha",
+    "dob": "2000-01-01T04:04:04+00:00",
+    "age": 4,
+    "chips": true,
+    "dq": "2000-01-01",
+    "in_role": "P1DT0S",
+    "open_time": "05:05:05.000000",
+    "colour": "Green",
+    "sock_colours": "Green,Blue",
+    "emails": [
+        "alpha@example.com",
+        "alpha@beta.com"
+    ]
+}
diff --git a/tests/__snapshots__/EntityUpdate/KeyedCollectionTest__test_ignores_immutable__1.json b/tests/__snapshots__/EntityUpdate/KeyedCollectionTest__test_ignores_immutable__1.json
new file mode 100644
index 000000000..f00f51c18
--- /dev/null
+++ b/tests/__snapshots__/EntityUpdate/KeyedCollectionTest__test_ignores_immutable__1.json
@@ -0,0 +1,18 @@
+{
+    "@context": "http://localhost/odata/$metadata#passengers/$entity",
+    "id": "alpha",
+    "name": "Alpha",
+    "age": 4,
+    "dob": "2000-01-01T04:04:04+00:00",
+    "chips": true,
+    "dq": "2000-01-01",
+    "in_role": "P1DT0S",
+    "open_time": "05:05:05.000000",
+    "flight_id": 1,
+    "colour": "Green",
+    "sock_colours": "Green,Blue",
+    "emails": [
+        "alpha@example.com",
+        "alpha@beta.com"
+    ]
+}
diff --git a/tests/__snapshots__/EntityUpdate/MongoTest__test_ignores_immutable__1.json b/tests/__snapshots__/EntityUpdate/MongoTest__test_ignores_immutable__1.json
new file mode 100644
index 000000000..bb8fbf5a9
--- /dev/null
+++ b/tests/__snapshots__/EntityUpdate/MongoTest__test_ignores_immutable__1.json
@@ -0,0 +1,18 @@
+{
+    "@context": "http://localhost/odata/$metadata#passengers/$entity",
+    "_id": "alpha",
+    "name": "Alpha",
+    "age": 4,
+    "dob": "2000-01-01T04:04:04+00:00",
+    "chips": true,
+    "dq": "2000-01-01",
+    "in_role": "P1DT0S",
+    "open_time": "05:05:05.000000",
+    "flight_id": 1,
+    "colour": "Green",
+    "sock_colours": "Green,Blue",
+    "emails": [
+        "alpha@example.com",
+        "alpha@beta.com"
+    ]
+}
diff --git a/tests/__snapshots__/EntityUpdate/NumericCollectionTest__test_ignores_immutable__1.json b/tests/__snapshots__/EntityUpdate/NumericCollectionTest__test_ignores_immutable__1.json
new file mode 100644
index 000000000..8cfcc770b
--- /dev/null
+++ b/tests/__snapshots__/EntityUpdate/NumericCollectionTest__test_ignores_immutable__1.json
@@ -0,0 +1,18 @@
+{
+    "@context": "http://localhost/odata/$metadata#passengers/$entity",
+    "id": 0,
+    "name": "Alpha",
+    "age": 4,
+    "dob": "2000-01-01T04:04:04+00:00",
+    "chips": true,
+    "dq": "2000-01-01",
+    "in_role": "P1DT0S",
+    "open_time": "05:05:05.000000",
+    "flight_id": 1,
+    "colour": "Green",
+    "sock_colours": "Green,Blue",
+    "emails": [
+        "alpha@example.com",
+        "alpha@beta.com"
+    ]
+}
diff --git a/tests/__snapshots__/EntityUpdate/RedisTest__test_ignores_immutable__1.json b/tests/__snapshots__/EntityUpdate/RedisTest__test_ignores_immutable__1.json
new file mode 100644
index 000000000..86d5fdc83
--- /dev/null
+++ b/tests/__snapshots__/EntityUpdate/RedisTest__test_ignores_immutable__1.json
@@ -0,0 +1,18 @@
+{
+    "@context": "http://localhost/odata/$metadata#passengers/$entity",
+    "name": "Alpha",
+    "age": 4,
+    "dob": "2000-01-01T04:04:04+00:00",
+    "chips": true,
+    "dq": "2000-01-01",
+    "in_role": "P1DT0S",
+    "open_time": "05:05:05.000000",
+    "flight_id": 1,
+    "colour": "Green",
+    "sock_colours": "Green,Blue",
+    "emails": [
+        "alpha@example.com",
+        "alpha@beta.com"
+    ],
+    "key": "alpha"
+}
diff --git a/tests/__snapshots__/EntityUpdate/SQLTest__test_ignores_immutable__1.json b/tests/__snapshots__/EntityUpdate/SQLTest__test_ignores_immutable__1.json
new file mode 100644
index 000000000..b75bf1e83
--- /dev/null
+++ b/tests/__snapshots__/EntityUpdate/SQLTest__test_ignores_immutable__1.json
@@ -0,0 +1,18 @@
+{
+    "@context": "http://localhost/odata/$metadata#passengers/$entity",
+    "id": 1,
+    "name": "Alpha",
+    "age": 4,
+    "dob": "2000-01-01T04:04:04+00:00",
+    "chips": true,
+    "dq": "2000-01-01",
+    "in_role": "P1DT0S",
+    "open_time": "05:05:05.000000",
+    "flight_id": 1,
+    "colour": "Green",
+    "sock_colours": "Green,Blue",
+    "emails": [
+        "alpha@example.com",
+        "alpha@beta.com"
+    ]
+}