I tried to update created/updated time in GDN_Activity but it still show the old date/time. I updated it in Data column as well but it didn't change it on my board. I am very confused... Where is it stored in the DB?
If I change in GDN_Activity column DateInserted, that change is reflected immediately
Do I need to clean cache after this?
Actually I use an older version. 2.3.1, can it be a cached in this version?
Nothing to clear on Vanilla side, but try visiting your forum from a private browser window. Maybe what you are seeing is a local browser caching issue