How to handle Attestations going to a new version


I'm wondering if anyone has gone from v6 to v7 and how they handled attestation cases.

We built a new v7 environment and plan to cut over soon. We did not migrate over from v6 so there are no attestations cases from previous environment.

I don't want all the attestation cases to fire off and wondering if there is a way to account for attestations from v6.

Or how anyone has done this before and how they did it?

I've tried to run some imports or create cases and edit datehead and isClosed and isGranted but the fields are not editable.

Any help is greatly appreciated.