I'm a Diamond member previously using the Peacock benefit for years. But now my premium access seems to have gone away. Can someone help?

Hello. I've been on Diamond status for some years now, and have had the Peacock Premium benefit active for at least a few years. However, as of yesterday, this no longer seems to be the case. I can see on my rewards account that I can claim my Peacock benefit again; however, I don't know if this would be my same Diamond status perk, or the Peacock plan that's included with my gigabit plan. I do have an "Activate" button that should set up my Peacock account, but when I try to follow the instructions and provide the same credentials I was using before, I get an error that my Xfinity account is linked to another Peacock account. I do not have any other Peacock accounts. How do I resolve this? Do I have to use a new email for Peacock? I would strongly prefer to have Peacock through my Diamond status if still possible, since that doesn't appear to be time-limited like the offer through my gigabit plan likely is.