--- Comment #6 from bs...@wikimedia.org ---
I believe this is a data inconsistency issue, we have about 180 flow records in
recentchanges table without 'action', 'block', 'revision_type' keys. I suspect
that the maintenance script missed some flow type during the conversion and
only unset type. All these data were generated before or around the time the
patch was merged.
Deleting those invalid data should solve the issue: delete from recentchanges
where rc_type = '142' and rc_source = 'flow' and rc_params not like
'%revision_type%'; Adding graceful failing ensures extra security, :)
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