ORA-22894: cannot add constraint on existing unscoped REF columns of non-empty tables
Cause: An attempt was made to add a constraint to existing unscoped REF columns of a table which contains one or more rows.
Action: Remove the constraint specification or add the constraint after emptying the table.
Cause: An attempt was made to add a constraint to existing unscoped REF columns of a table which contains one or more rows.
Action: Remove the constraint specification or add the constraint after emptying the table.
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