AI-Studio does not honor Gemini key

I have upgraded my new AI-Studio project with my existing gemini key but AI-Studio is not honoring it even though it says I’ve successfully upgraded. the upgrade message comes back and development is still stopped.

Followed the tips from others bit still have same issue.

Something new! What is this? Why would I need to prepay?

I figured it out. My project was attached to a firebase billing account for some reason which required me to pre-pay. I changed billing for the project to my normal billing account and AI-Studio liked that and started working. I did not have to unlink and relink. Hope this helps!