fix

main.py

@@ -3185,7 +3185,26 @@ async def profile_invitation(
     user: Dict = Security(get_current_user)
 ):
     data = await invitations_collection.find_one({'_id': ObjectId(invitation_id)})
-    posts = await delivery_collection.find({'competition_id': data.get('competition').get('_id')}).to_list()
+    cursor = delivery_collection.aggregate([
+        {"$match": {
+            "$or": [
+                {"sender._id": user.get('_id')},
+                {"user._id": user.get('_id')},
+                {"receiver._id": user.get('_id')}
+            ],
+            'prod': PROD,
+            'competition_id': data.get('competition').get('_id'),
+        }},
+        {"$sort": {"_id": -1}},
+        {"$group": {
+            "_id": "$post_id",
+            "doc": {"$first": "$$ROOT"}
+        }},
+        {"$replaceRoot": {"newRoot": "$doc"}},
+        {"$sort": {"_id": -1}},
+    ])
+
+    posts = [doc async for doc in cursor]
     return templates.TemplateResponse(
         request=request, name="profile/invitation.html", context={ "user": user, "doc": data, "data": posts}
     )