Can't be done (apart from database restore and/or partial restore and table hacking...)
Raised https://jira.atlassian.com/browse/GHS-6163 to implement deletions as soft delete.
There is a series of steps that involves
which is not supported, and most likely is going to disrupt other users. In short, you can't do it for the same reasons you weren't able to restore the whole database...
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