XF 1.5 Thread data-avatar-htlml incorrectly set after migration

Alfa1

Well-known member
One of my members reported an issue that threads he posted in are not marked as such as the mini avatar doesn't show up. While other threads that he didn't start are showing his avatar as if he was the thread starter.
This only relates to thread he posted in previous to the migration from vbulletin.

Is there any way to resynch this?
 
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