Can not delete image configuration if used in instance scheduling

2010-09-09 14:36:15,156 INFO [1921423913@qtp-1196121930-3] [LocalAgentManagerImpl] Attempting to remove build agent...
2010-09-09 14:36:15,182 WARN [1921423913@qtp-1196121930-3] [JDBCExceptionReporter] SQL Error: 0, SQLState: null
2010-09-09 14:36:15,182 ERROR [1921423913@qtp-1196121930-3] [JDBCExceptionReporter] Batch entry 0 delete from ELASTIC_IMAGE where ELASTIC_IMAGE_ID=131075 was aborted. Call getNextException to see the cause.
2010-09-09 14:36:15,182 WARN [1921423913@qtp-1196121930-3] [JDBCExceptionReporter] SQL Error: 0, SQLState: 23503
2010-09-09 14:36:15,182 ERROR [1921423913@qtp-1196121930-3] [JDBCExceptionReporter] ERROR: update or delete on table "elastic_image" violates foreign key constraint "fk1c6b30e1581fb731" on table "elastic_schedule"
Detail: Key (elastic_image_id)=(131075) is still referenced from table "elastic_schedule".
2010-09-09 14:36:15,184 WARN [1921423913@qtp-1196121930-3] [JDBCExceptionReporter] SQL Error: 0, SQLState: null
2010-09-09 14:36:15,184 ERROR [1921423913@qtp-1196121930-3] [JDBCExceptionReporter] Batch entry 0 delete from ELASTIC_IMAGE where ELASTIC_IMAGE_ID=131075 was aborted. Call getNextException to see the cause.
2010-09-09 14:36:15,184 WARN [1921423913@qtp-1196121930-3] [JDBCExceptionReporter] SQL Error: 0, SQLState: 23503
2010-09-09 14:36:15,184 ERROR [1921423913@qtp-1196121930-3] [JDBCExceptionReporter] ERROR: update or delete on table "elastic_image" violates foreign key constraint "fk1c6b30e1581fb731" on table "elastic_schedule"
Detail: Key (elastic_image_id)=(131075) is still referenced from table "elastic_schedule".
2010-09-09 14:36:15,184 ERROR [1921423913@qtp-1196121930-3] [SessionImpl] Could not synchronize database state with session