ERROR: (1062, "Duplicate entry 'C0001' for key 'PRIMARY'")

ERROR: (1452, 'Cannot add or update a child row: a foreign key constraint fails (`profitina_laundry`.`Bill`, CONSTRAINT `Bill_Customer` FOREIGN KEY (`Customer_id`) REFERENCES `Customer` (`id`) ON UPDATE CASCADE)')

ERROR: (4025, 'CONSTRAINT `Bill_unit_pos` failed for `profitina_laundry`.`Bill`')

ERROR: (1451, 'Cannot delete or update a parent row: a foreign key constraint fails (`profitina_laundry`.`Bill`, CONSTRAINT `Bill_Customer` FOREIGN KEY (`Customer_id`) REFERENCES `Customer` (`id`) ON UPDATE CASCADE)')

