How To Prevent Replication Failure If I become a MySQL DBA, will I had to deal all day with those kind of issues or do you have tips to prevent from breaking the whole replication?

I received this message because I removed manually the database, and after that the php script remove it. 

Last_SQL_Errno: 1133`
Error 'Can't find any matching row in the user table' on query.`
I found this.

slave-skip-errors=1133