Deleting an attachment by guest user


Just a quick question, as a sheet owner I would think I could delete a row/card attachment placed there by a guest user, but it seems it's grayed out. Does anyone have a work-around for this?

Also, is there a way for a guest to upload and attach a document as a version two to the original file? It seems like it always makes guest users attach a new file which kind of leads to this problem in the first place. Thanks in advance.


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