i'm seeing stuff like:
[27f198e8769b68587601631c] /w/api.php Wikimedia\Rdbms\DBQueryError from line 1603 of /srv/mediawiki/w/includes/libs/rdbms/database/Database.php: A database query error has occurred. Did you forget to run your application's database schema updater after upgrading? Query: INSERT INTO `Comments_Vote` (Comment_Vote_id,Comment_Vote_actor,Comment_Vote_Score,Comment_Vote_Date,Comment_Vote_IP) VALUES ('283','818','1','2020-05-22 02:38:41','xxxx') Function: Comment::vote Error: 1062 Duplicate entry '283-' for key 'Comments_Vote_user_id_index' (dbt1.miraheze.org) #0 /srv/mediawiki/w/includes/libs/rdbms/database/Database.php(1574): Wikimedia\Rdbms\Database->getQueryExceptionAndLog(string, integer, string, string) #1 /srv/mediawiki/w/includes/libs/rdbms/database/Database.php(1152): Wikimedia\Rdbms\Database->reportQueryError(string, integer, string, string, boolean) #2 /srv/mediawiki/w/includes/libs/rdbms/database/Database.php(2140): Wikimedia\Rdbms\Database->query(string, string) #3 /srv/mediawiki/w/includes/libs/rdbms/database/DBConnRef.php(68): Wikimedia\Rdbms\Database->insert(string, array, string) #4 /srv/mediawiki/w/includes/libs/rdbms/database/DBConnRef.php(371): Wikimedia\Rdbms\DBConnRef->__call(string, array) #5 /srv/mediawiki/w/extensions/Comments/includes/Comment.php(636): Wikimedia\Rdbms\DBConnRef->insert(string, array, string) #6 /srv/mediawiki/w/extensions/Comments/includes/api/CommentVoteAPI.php(19): Comment->vote(string) #7 /srv/mediawiki/w/includes/api/ApiMain.php(1598): CommentVoteAPI->execute() #8 /srv/mediawiki/w/includes/api/ApiMain.php(537): ApiMain->executeAction() #9 /srv/mediawiki/w/includes/api/ApiMain.php(508): ApiMain->executeActionWithErrorHandling() #10 /srv/mediawiki/w/api.php(87): ApiMain->execute() #11 {main}
in the logs.