Using Photography Plan Redemption Code while having Creative Cloud

Hi everyone,

I am currently using adobe creative cloud student plan prepaid version, however, I bought an external drive from Seagate and it comes with a redemption code for photography plan. The problem is, my CC plan will be ended in September 2021 and the redemption code should be redeemed by January 2021. There is an explanation about redemption code on Adobe website, however, it just states the situation where you have a redemption code for the same plan or having subscription for photo plan and having redemption code for CC. My CC already consists of photo plan. I use CC primarily for photo purposes so I want to use the photo plan after my CC subscription will be ended. Is this possible? What can I do about it?

Thanks for your help in advance.