pt-heartbeat breaks replication if started on slave with an empty table

If you start pt-heartbeat on slave before you have any entry on the table, the tool will insert a row in the table even if you have set --monitor argument. Once you start the tool on master, it will insert the first row in the table and it will break replication.

How to repeat:

Note:
If you have your slave as read_only and/or super_read_only step 2 will fail on below error: