## -7040: Referential constraint not allowed

### Explanation:

There is already a referential CONSTRAINT definition with the specified referencing table. Moreover, CASCADE dependency arises. Under these conditions, all CONSTRAINT definitions with the indicated referencing table must specify either CASCADE or RESTRICT.

### User Action:

Rethink the desired effect, because it would result in basically contesting situations. You can view information about existing referential CONSTRAINT definitions using a QUERY statement issued on the DOMAIN.FOREIGNKEYCOLUMNS system table.