| ERROR | column string is already part of a column group |
| CAUSE | Attempted to add a column to a column group when the column was already a member of a column group. |
| ACTION | Drop the column from its existing column group before trying to add it to another. |
| ERROR | column string is already part of a column group |
| CAUSE | Attempted to add a column to a column group when the column was already a member of a column group. |
| ACTION | Drop the column from its existing column group before trying to add it to another. |