I am getting loads of events from non-existent triggers with PROBLEM (1) value:

mysql> select * from events where value=1 and acknowledged=0 limit 10;
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10 rows in set (1.64 sec)

mysql> select * from triggers where triggerid=196;
Empty set (0.00 sec)

I am getting this on out production server which is running 1.8.4, but not on testing servers.

Any ideas how can I help you to debug this issue?

Thanks,
Marcel