it is started coming after i created foreign key in a table using
ALTER TABLE xxx ADD CONSTRAINT xxx FOREIGN KEY (xxx) REFERENCES xxx (xxx) DEFERRABLE;Did you add the constraint to this table (t1) or another table? Could you confirm which user you created this constraint as and which table you have created this constraint on? Ws this on a SYS table? Also, could you check the alert log to see if there are any errors that are logged at the time you get this error message.