Duplicate of #740

This is not really a duplicate, I was only speaking about duplicated names. Not about duplicated configuration as in #740. This issue is probably way easier to solve than #740 and would avoid 500 errors

@benoit74 Today, I lost around 15 mn because of that issue. Considering we have a PR we should anyway be treated/improved/... and the impact is very "vicious" (old ZIM disappear from library.kiwix.org) Could you please fix this in priority?

@kelson42 I don't think your problem is the same as this issue. This issue (and corresponding PR) is speaking about duplicated schedule name. You seem to have an issue about duplicate ZIM name. This is a distinct problem far more complex to solve (please open an issue if you confirm your problem is a different problem). As indicated here, this issue is only about better handling of duplicate schedule name which are currently raising 500 errors. And this is seemed not a very important thing since it is very rare to happen in our history (we are being alarmed on every 500 error since months now).

@kelson42 I'm still waiting on your feedback about your recent issue. Can you clarify what made you loose 15 mn of your precious time so that we know what needs to be enhanced to not do it again? I'm quite sure your problem is duplicate ZIM name and not duplicate recipe name, but I would like to have your confirmation.

@benoit74 You are 100% right, this is a duplicate ZIM metadata "Name". My bad.

I isolated your specific issue here: #1037