Unable to redeem 3 month prepaid music pass

Contact official support for this.

Support.xbox.com/contact-us

I did it, so I saw "Select your Xbox Music Pass" again.

I want to renew 12 Month Prepaid Music Pass".

I don't want to purchase "12-month pass".

The Music Passes have never been shareable between family members. It's possible they were logged into the same account that had the music pass, or were signed into Zune using music that had been downloaded to the PC.

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For those of you who are having problems buying the Music Pass for child/secondary accounts, you can get the pass in prepaid codes and redeem it that way.

OP if you have Redeemed your 12 month pass , you shouldn't be having issues .here is a link that can assist you

support.xbox.com/.../redeem-prepaid-codes

Did a bit more digging in the FAQs, no issues at all for existing Game Pass members (direct quote from FAQ):

If you're already an Xbox Live Gold or Xbox Game Pass member, any days remaining in your membership(s) will be converted to Xbox Game Pass Ultimate at a conversion ratio when you redeem the 24-month Xbox Game Pass Ultimate
membership and added to your Ultimate membership up to a maximum of 36 months. Xbox Game Pass Ultimate memberships are limited to 36 months.

If you’re already an Xbox Game Pass Ultimate member, wait until your existing membership has a prepaid balance that is less than 12 months before redeeming the 24-month Xbox Game Pass Ultimate membership through Xbox All
Access. You will be unable to redeem with more than 12 prepaid months of Xbox Game Pass Ultimate.

To check your prepaid balance, go to https://account.microsoft.com/services. Note, once converted to Xbox Game Pass Ultimate, Xbox Live
Gold and other Game Pass memberships cannot be unconverted. Learn more at www.xbox.com/gamepass.