Are you saying that "from time to time it happens that data gets inserted
directly to the slave"? In other words, they are NOT inserted into the
master.
Have you looked into using this mysqld option, which prevents accidental
slave updates?
--read-only Make all tables readonly, with the
Hello.
> 'pmv_manager_log_bin.69' at position 743
Find out with mysqlbinlog utility what statement causes
the error. Then execute it manually on the slave to get an
error code which it produces. What version of MySQL are you using?
May be with the fresher one you will get more informat