stop slave; drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9; reset master; reset slave; drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9; start slave; create table t1 (a int, unique(a)) engine=myisam; set sql_log_bin=0; insert into t1 values(2); set sql_log_bin=1; insert into t1 values(1),(2); ERROR 23000: Duplicate entry '2' for key 'a' drop table t1; Error: "Query caused different errors on master and slave. Error on master: 'Duplicate entry '%-.192s' for key %d' (1062), Error on slave: 'no error' (0). Default database: 'test'. Query: 'insert into t1 values(1),(2)'" (expected different error codes on master and slave) Errno: "0" (expected 0) drop table t1;