Do we need to open all the prior period while Rerun translation process after we change CTA value

Summary:

We have to now update CTA value, we are running Translation process from last few years now.

Following are the steps we have identified from different posts/sources.

1. Run the Delete Translated Balances process and after the process completes, rebuild the balances cube( using the Create General Ledger Balances Cube process)
2. On the Specify Ledger Options page, edit the Cumulative Translation Adjustment Account value.
3. Rerun the 'Translate General Ledger Account Balances' process.

I Have following Questions:-

1. Delete Translated Balances process : - Parameter 'From Accounting Period' value should be very first period shown in the LOV (i.e. DEC-20)
2. Create General Ledger Balances Cube : - Parameter 'Starting Period' value should be very first period shown in the LOV (even though first period in this LOV (i.e.