While importing pages on cplostwikis.miraheze.org, I encountered the following error:
[038812f60b8b45e95837e2b3] 2021-06-09 17:04:03: Fatal exception of type "Wikimedia\Rdbms\DBTransactionError"
Then, while attempting to browse the wiki logs immediately after that, I encountered the following error:
"[f6ca6b5bfb09c092eff32719] 2021-06-09 17:06:53: Fatal exception of type "LogicException""
I reported this on the Miraheze IRC channel and was advised to make a Phabricator task.