retransport datasource

Hi All,

I have migrated a 3.5 datasource to 7.0 and transported from dev to acc.

Now we have to refresh the acc from prd because of an issue in acc.

Then I have to retransport the datasource from dev to acc.

Do I have to simply retransport the 7.0 datasource or

first restore the datasource back to 3.5 and after migrate and transport to acc.

Thanks,

Spyros