| ERROR | column string is NULL and cannot be indexed |
| CAUSE | You tried to index a row where at least one of the meta columns was NULL. |
| ACTION | provide a value for the meta column and reindex the row |
| ERROR | column string is NULL and cannot be indexed |
| CAUSE | You tried to index a row where at least one of the meta columns was NULL. |
| ACTION | provide a value for the meta column and reindex the row |