do not delte documents from rich text

src/Glpi/Asset/Capacity/HasDocumentsCapacity.php

@@ -61,12 +61,14 @@ public function getCloneRelations(): array
 
     public function isUsed(string $classname): bool
     {
+        // TODO filter using 'timeline_position' => 0 criteria
         return parent::isUsed($classname)
             && $this->countAssetsLinkedToPeerItem($classname, Document_Item::class) > 0;
     }
 
     public function getCapacityUsageDescription(string $classname): string
     {
+        // TODO filter using 'timeline_position' => 0 criteria
         return sprintf(
             __('%1$s documents attached to %2$s assets'),
             $this->countPeerItemsUsage($classname, Document_Item::class),
@@ -88,7 +90,16 @@ public function onCapacityDisabled(string $classname): void
 
         // Delete relations to documents
         $document_item = new Document_Item();
-        $document_item->deleteByCriteria(['itemtype' => $classname], force: true, history: false);
+        $document_item->deleteByCriteria(
+            [
+                'itemtype' => $classname,
+                // 0 is the value when a document is attached manually
+                // filtering on this value prevents removal of documents attached from rich text fields
+                'timeline_position' => 0,
+            ],
+            force: true,
+            history: false
+        );
 
         // Clean history related to documents
         $this->deleteRelationLogs($classname, Document::class);