ship to customer update for active subscription

Summary:

We need to update ship to and bill to customer, accounts, sites and contacts in active subscriptions. But System is not allowing this update either in UI or through Import management.

We had same issue for bill to as well, but it started working after enabling profile option "Update Customer without Amendment Allowed" as “Yes”.

Both ship to and bill to customer details are updatable in subscription product for Active subscriptions. We need provision to update ship to customer, account, sites and contacts in subscription header. Please share steps to enable this for update.

Tried through sandbox, but these fields were already updatable.