It’s looking like it’s connected to the allow_anonymous_likes setting somehow.
I’ve had a bit of a play to see if I can trigger the same error, but entering Anonymous Mode and throwing some Likes/Reactions around and then removing them or deleting the posts hasn’t triggered it. I also toggled off allow_anonymous_likes midway through and there was no conflict, it just disallowed being able to remove them. It also respected the post undo action window mins setting too.
I am not sure. 