connection node_2; connection node_1; SET GLOBAL wsrep_certify_nonPK = OFF; connection node_2; SET GLOBAL wsrep_certify_nonPK = OFF; connection node_1; CREATE TABLE t1 (f1 INTEGER) ENGINE=InnoDB /* Table has no primary key */; CREATE TABLE t2 (f1 INTEGER PRIMARY KEY) ENGINE=InnoDB; INSERT INTO t1 VALUES (1), (2); Got one of the listed errors INSERT INTO t2 VALUES (1), (2); UPDATE t2 SET f1 = 3 WHERE f1 = 1; connection node_2; SELECT COUNT(*) = 0 FROM t1; COUNT(*) = 0 1 SELECT COUNT(*) = 2 FROM t2; COUNT(*) = 2 1 SELECT COUNT(*) = 1 FROM t2 WHERE f1 = 3; COUNT(*) = 1 1 connection node_1; SET GLOBAL wsrep_certify_nonPK = 1; connection node_2; SET GLOBAL wsrep_certify_nonPK = 1; DROP TABLE t1; DROP TABLE t2; connection node_1; call mtr.add_suppression("SQL statement was ineffective"); disconnect node_2; disconnect node_1;