| ERROR | User string cannot remove reference string. |
| CAUSE | The user attempted to remove a SQL Tuning Set reference that does not exist. The user might not own the reference. |
| ACTION | Check the reference ID and the reference owner and retry the operation. |
| ERROR | User string cannot remove reference string. |
| CAUSE | The user attempted to remove a SQL Tuning Set reference that does not exist. The user might not own the reference. |
| ACTION | Check the reference ID and the reference owner and retry the operation. |