diff --git a/server/mongo/migrations/0.14.0.py b/server/mongo/migrations/0.14.0.py
new file mode 100644
index 0000000..4d478f3
--- /dev/null
+++ b/server/mongo/migrations/0.14.0.py
@@ -0,0 +1,46 @@
+import hashlib
+
+from pymongo.database import Database, Collection
+
+from service_repo.auth.fixed_user import FixedUser
+
+
+def _get_ids():
+    if not FixedUser.enabled():
+        return
+
+    return {
+        hashlib.md5(f"{user.username}:{user.password}".encode()).hexdigest(): user.user_id
+        for user in FixedUser.from_config()
+    }
+
+
+def _switch_uuid(collection: Collection, uuid_field: str, uuids: dict):
+    docs = list(collection.find({uuid_field: {"$in": [uuids]}}))
+    if not docs:
+        return
+    replaced_uuids = [doc[uuid_field] for doc in docs]
+    for doc in docs:
+        doc[uuid_field] = uuids[doc[uuid_field]]
+    collection.insert_many(docs)
+    collection.delete_many({uuid_field: {"$in": replaced_uuids}})
+
+
+def migrate_auth(db: Database):
+    uuids = _get_ids()
+    if not uuids:
+        return
+
+    collection = db["user"]
+    collection.drop_index("name_1_company_1")
+
+    _switch_uuid(collection=collection, uuid_field="_id", uuids=uuids)
+
+
+def migrate_backend(db: Database):
+    uuids = _get_ids()
+    if not uuids:
+        return
+
+    for name in ("project", "task", "model"):
+        _switch_uuid(collection=db[name], uuid_field="user", uuids=uuids)