[Feature Request] Add checkbox to enable overwritting existing problems on upload

When I edit a problem locally and upload the updated .zip to Hydro, the system assigns a new PID if that PID already exists. I can't delete the old problem to reuse the PID because it would result in the loss of historical submission records.

It would be highly appreciated if we could add a checkbox (e.g., "Overwrite when PID exists") to the upload interface. This would allow users to update existing problems without breaking the link to past submissions.