UBB.threads PHP Forum Software Community Forums UBB.classic [Archived] UBB.classic Bugs Flaky Recent Visitors [FIXED - 6.3.0]

my site usually has 200-300 people on at the same time.

I upgraded today and the counter made it up to about 120 before I began getting:

Could not find a forum_thread_data file for the following thread and forum: 0174, 93, 4

Is there anything I can do to clear this up or do I have to wait for the next release?