🇬🇧United Kingdom @jfk_research

Confirming that running drush queue:delete aggregator_feeds as suggested in #5 solved the same problem for us.

We had these errors because a feed was deleted while trying to solve an issue with a very large feed that was temporarily stopping cron from running. When the issue with the large feed was solved and cron started running again, lots of Update existing 'aggregator_feed' entity while changing the ID is not supported error messages appeared in the logs after each cron run.