"If you redeem a different plan with the same Adobe ID:
- Your subscription runs parallel to your existing paid subscription. For example, consider a scenario where you have an existing subscription to the Creative Cloud Photography plan with 20 GB of storage. However, you have a redemption code for the Creative Cloud All Apps plan. In this case, if you redeem the redemption code, your subscription to Creative Cloud All Apps runs concurrently with the existing Creative Cloud Photography plan"