SYMPTOM:
When trying to edit an attribute, the following error appears in Strategy Developer 9.x and 10.x:

CAUSE:
This issue happens because one of the attribute forms is not mapped to any table column.
ACTION:
Please contact Strategy Technical Support for further assistance. In order to track down the cause of the inconsistency, customers encountering this issue should make note of Schema-related changes, Object Migrations, or error messages prior to experiencing the problem. Change Journaling, if it has been enabled, can help in preserving this information.