Calculation Field to apply on past submissions

I have created a field titled "Calendar Data" that brings in data from two other fields "Type of Party" and "Number of Guests".

Is there anyway I can make that field update for previous submissions?

When I go into an older submissions, the new field is blank. Can I force it to auto-update for all past submissions?

Thanks in advance.

When I go into an older submissions, the new field is blank. Can I force it to auto-update for all past submissions?

You can do it by re-submitting the form with the existing submissions.

You can use the EDIT button in the Submission panel to edit the submission and just submit the form again within.

Let us know if this did not work.

Thanks.