It doesn't look good for sure. I think I have only once or twice an error post where something double posted.
Perhaps a good idea in that case is to initially mark as error, but then come back with a short post showing some effort. Having a generic post saved is a pretty good idea too.
Is this one of those posts? 🤔
@riverflows recently did this exact thing, came back quickly and smashed out a replacement post as she'd posted in the wrong community or some such thing. Certainly not a good look for a user to have posts saying deleted on their feeds.
I'm glad you like my generic emergency post idea. I actually have have two sitting there ready to go at all times.