DROP TABLE IF EXISTS bug_61209;
CREATE TABLE bug_61209 (a INT auto_increment, PRIMARY KEY(a)) ENGINE=InnoDB;
INSERT INTO bug_61209 VALUES (), (), (), ();
connect  con1,localhost,root,,;
connect  con2,localhost,root,,;
connection con1;
SET SESSION auto_increment_increment=3;
SET SESSION auto_increment_offset=2;
SELECT GET_LOCK('a', 9);
GET_LOCK('a', 9)
1
connection con2;
SET SESSION auto_increment_increment=3;
SET SESSION auto_increment_offset=2;
INSERT INTO bug_61209 (a) VALUES (NULL), (NULL), (NULL + GET_LOCK('a', 10));
connection con1;
INSERT INTO bug_61209 (a) VALUES (NULL), (NULL), (NULL);
SELECT RELEASE_LOCK('a');
RELEASE_LOCK('a')
1
connection con2;
DROP TABLE bug_61209;