Make a completed contract "void" / "cancelled" / "reset"

[hnykda]

It is sometimes the case that a submission is filled in wrongly (e.g. a signatory party makes an error, like spells their name wrong). Currently, I don't see a way how one could (on a complete submission):

1. resubmit/edit (I understand that breaks things, as e.g. you don't want to make signed contracts "editable" - but an admin could "reset" everything)
2. mark the contract as "void"

[z0lo13]

Alternatively, maybe something like "request to resubmit" endpoint could be added.
Pass the submitters ids to the submission, and only those submitters must resign.