TablesDB: deleting a row with an empty two-way manyToOne (onDelete: setNull) returns 500 general_unknown

### 👟 Reproduction steps 1. In Appwrite Cloud (TablesDB), create table A (example: Files) and table B (example: users). 2. Add a two-way manyToOne relationship: - Parent: A.owner → B - Child: B.files → A - onDelete: setNull 3. Create a row in B with files = [] (no related A rows). Confirm a list query on A.owner for that B id returns 0 rows. 4. Optional: also delete the matching Auth user. Leave B.accountId as a plain required string (not a relationship). This does not change the result. 5. Try to unlink first: - PATCH B.files = null → 400 relationship_value_invalid (“Must be either an array of documents or document IDs, NULL given”). - PATCH B.files = [] is accepted and stays []. 6. DELETE the B row from Console or the API (tablesDB.deleteRow / databases.deleteDocument). ### 👍 Expected behavior The B row should delete. Per https://appwrite.io/docs/products/databases/tablesdb/relationships , onDelete setNull with no related rows should not block delete. An empty relationship should be treated as unlinked. ### 👎 Actual Behavior DELETE returns HTTP 500, type general_unknown, message "Server Error". The child relationship column is already []. Setting it to null is rejected. There are no parent rows pointing at this id. A missing Auth user is not the cause: accountId is only a required string, not a relationship, and Auth user_not_found does not stop this 500. This matches the class of failures in https://github.com/appwrite/appwrite/issues/5850 and https://github.com/appwrite/appwrite/issues/7170 , reproduced here on Cloud TablesDB with zero related rows. ### 🎲 Appwrite version Appwrite Cloud ### 💻 Operating system Linux ### 🧱 Your Environment Appwrite Cloud (Frankfurt region, endpoint https://fra.cloud.appwrite.io/v1). Exact Cloud build is not exposed in Console. Client SDK: appwrite 22.4.1 (web) Server SDK: node-appwrite 20.0.0 API used: TablesDB (tablesDB.deleteRow / updateRow), not the legacy Databases documents API. Environment is not customi…