| ERROR | object group string.string is not mastered at string |
| CAUSE | The group name is null, the group name is misspelled, the invocation database is not a master, or the invocation database does not believe the given database is a master. |
| ACTION | If the given group name was correct, connect to a current master and retry the request, make the invocation database a master with add_master_database, or use switch_mview_master if the invocation database is a materialized view site. |