diff --git a/Makefile b/Makefile
index 3a1f445b..fe8c61aa 100644
--- a/Makefile
+++ b/Makefile
@@ -395,7 +395,7 @@ seed-oidc: ## seed the OIDC provider
 seed-dashboard: ## seed dashboard
 	@echo "Running dashboard service database engine…"
 	@$(COMPOSE_UP) --wait postgresql
-	@echo "Seeding dashboard…"#
+	@echo "Seeding dashboard…"
 	@bin/manage loaddata dashboard/fixtures/dsfr_fixtures.json
 	@bin/manage seed_consent
 .PHONY: seed-dashboard
diff --git a/data/irve-statique.json.gz b/data/irve-statique.json.gz
index 6e09b4f7..a3278745 100644
Binary files a/data/irve-statique.json.gz and b/data/irve-statique.json.gz differ
diff --git a/data/irve-statique.parquet b/data/irve-statique.parquet
index 2dec02a8..90a1c4bc 100644
Binary files a/data/irve-statique.parquet and b/data/irve-statique.parquet differ
diff --git a/src/api/CHANGELOG.md b/src/api/CHANGELOG.md
index e6b93287..e661c951 100644
--- a/src/api/CHANGELOG.md
+++ b/src/api/CHANGELOG.md
@@ -13,6 +13,7 @@ and this project adheres to
 - Activate and configure Sentry profiling by setting the
   `SENTRY_PROFILES_SAMPLE_RATE` configuration
 - Set request's user (`username`) in Sentry's context
+- Add `Localisation.coordonneesXY` unique contraint [BC] 💥
 
 ### Changed
 
@@ -37,6 +38,10 @@ and this project adheres to
 
 - Renamed database `raccordementemum` to `raccordementenum`
 
+### Removed
+
+- Remove `Localisation.adresse_station` unique constraint
+
 ## [0.16.0] - 2024-12-12
 
 ### Changed
diff --git a/src/api/qualicharge/factories/static.py b/src/api/qualicharge/factories/static.py
index 23230de3..d4663d96 100644
--- a/src/api/qualicharge/factories/static.py
+++ b/src/api/qualicharge/factories/static.py
@@ -62,6 +62,12 @@ class StatiqueFactory(ModelFactory[Statique]):
         lambda: DataclassFactory.__random__.choice(prefixes)
         + FrenchDataclassFactory.__faker__.pystr_format("E######")
     )
+    coordonneesXY = Use(
+        lambda: (
+            f"[{round(DataclassFactory.__random__.uniform(-180,180), 6)}, "  # longitude
+            f"{round(DataclassFactory.__random__.uniform(-90,90), 6)}]"  # latitude
+        )
+    )
 
     @post_generated
     @classmethod
diff --git a/src/api/qualicharge/migrations/versions/8144a7d2553d_update_localisation_uniqueness_.py b/src/api/qualicharge/migrations/versions/8144a7d2553d_update_localisation_uniqueness_.py
new file mode 100644
index 00000000..771cfe9c
--- /dev/null
+++ b/src/api/qualicharge/migrations/versions/8144a7d2553d_update_localisation_uniqueness_.py
@@ -0,0 +1,33 @@
+"""Update localisation uniqueness criterions
+
+Revision ID: 8144a7d2553d
+Revises: c09664a85912
+Create Date: 2025-01-10 10:18:50.745037
+
+"""
+
+from typing import Sequence, Union
+
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision: str = "8144a7d2553d"
+down_revision: Union[str, None] = "d3d2c20f8efd"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.drop_constraint(
+        "localisation_adresse_station_key", "localisation", type_="unique"
+    )
+    op.create_unique_constraint(
+        "localisation_coordonneesXY_key", "localisation", ["coordonneesXY"]
+    )
+
+
+def downgrade() -> None:
+    op.drop_constraint("localisation_coordonneesXY_key", "localisation", type_="unique")
+    op.create_unique_constraint(
+        "localisation_adresse_station_key", "localisation", ["adresse_station"]
+    )
diff --git a/src/api/qualicharge/schemas/core.py b/src/api/qualicharge/schemas/core.py
index 1c88b3d6..ff15876e 100644
--- a/src/api/qualicharge/schemas/core.py
+++ b/src/api/qualicharge/schemas/core.py
@@ -122,7 +122,7 @@ class Localisation(BaseTimestampedSQLModel, table=True):
     )
 
     id: UUID = Field(default_factory=uuid4, primary_key=True)
-    adresse_station: str = Field(unique=True)
+    adresse_station: str
     code_insee_commune: str = Field(regex=r"^([013-9]\d|2[AB1-9])\d{3}$")
     coordonneesXY: DataGouvCoordinate = Field(
         sa_type=Geometry(
@@ -131,6 +131,7 @@ class Localisation(BaseTimestampedSQLModel, table=True):
             srid=4326,
             spatial_index=True,
         ),
+        unique=True,
     )  # type: ignore
 
     # Relationships
diff --git a/src/api/qualicharge/schemas/sql.py b/src/api/qualicharge/schemas/sql.py
index 674669de..c528d35e 100644
--- a/src/api/qualicharge/schemas/sql.py
+++ b/src/api/qualicharge/schemas/sql.py
@@ -289,7 +289,7 @@ def save(self):
         self._save_schema(
             self.localisation,
             Localisation,
-            constraint="localisation_adresse_station_key",
+            constraint="localisation_coordonneesXY_key",
         )
         self._save_schema(
             self.station,
diff --git a/src/notebook/misc/clean-static-dataset.md b/src/notebook/misc/clean-static-dataset.md
index d12e8eac..c72faaa6 100644
--- a/src/notebook/misc/clean-static-dataset.md
+++ b/src/notebook/misc/clean-static-dataset.md
@@ -101,6 +101,52 @@ fixed.to_json("../../data/irve-statique.json.gz", orient="records", lines=True,
 fixed.to_parquet("../../data/irve-statique.parquet", compression="gzip")
 ```
 
+## Clean duplicated coordinates
+
+```python
+import pandas as pd
+
+static = pd.read_parquet("../../../data/irve-statique.parquet")
+static
+```
+
+Get a list of unique `coordonneesxy`/`adresse_station` couples.
+
 ```python
+addr_crds = static[~static.duplicated(["coordonneesxy", "adresse_station"], keep='first')][["adresse_station", "coordonneesxy"]]
+addr_crds
+```
+
+Remove duplicated coordinates, as it's supposed to be unique in the database (two different addresses are not supposed to have the same coordinates).
+
+```python
+pd.set_option('display.max_rows', 50)
+selected_addr_crds = addr_crds[~addr_crds.duplicated(["coordonneesxy"], keep="first")]
+selected_addr_crds
+```
+
+Perform rows selection.
 
+```python
+cleaned_static = static[static["adresse_station"].isin(selected_addr_crds["adresse_station"]) & static["coordonneesxy"].isin(selected_addr_crds["coordonneesxy"])]
+cleaned_static[["id_pdc_itinerance", "coordonneesxy", "adresse_station"]]
+```
+
+Clean column names and Enums.
+
+```python
+cleaned_static = cleaned_static.rename(columns={"coordonneesxy": "coordonneesXY"})
+cleaned_static = cleaned_static.replace(to_replace=enum_to_replace, value=enum_value)
+
+cleaned_static
+```
+
+Export to json + parquet
+
+```python
+cleaned_static.to_json("../../../data/irve-statique.json.gz", orient="records", lines=True, compression="gzip")
+```
+
+```python
+cleaned_static.to_parquet("../../../data/irve-statique.parquet")
 ```