An INSERT or UPDATE statement issued on a table that is the referencing table in a referential CONSTRAINT definition produces a row that is not a matching row of the CONSTRAINT definition.

Deleting rows from a referenced table in a referential CONSTRAINT definition using ON DELETE RESTRICT in the DELETE rule produces a matching row.

Display the definition of the referential CONSTRAINT definition using a QUERY statement issued on the DOMAIN.FOREIGNKEYCOLUMNS system table. Change the INSERT or UPDATE statement according to this definition.

Use a suitable QUERY statement to find out which row of the referencing table prevents the required rows from being deleted from the referenced table.