activate windows popup stuck on screen after upgrading cpu and motherboard

When I had gotten this computer it originally had a pretty bad CPU and motherboard, so recently I switched them out a few days ago for much better tech, but now the little transparent "activate windows" popup is stuck on my screen even though I still have the same exact hard drive (and everything but the new CPU and motherboard) still installed. I've tried to troubleshoot and even go through the BIOS to figure out how I can fix the issue but the troubleshooter says "unable to activate windows" and I even click the "I have changed hardware recently" button, but it just tells me "the digital license for this device has already been used to reactivate windows" and I need to buy a new version of windows. it also says I can update to windows 11 but I am not, for the life of me, going to do that. If there are ANY solutions that anyone else has had for this same issue, that would be greatly appreciated but if nothing works its not going to kill me to just buy a new product key. also the new CPU is a Ryzen 5 5600x and the motherboard is a MSI MAG b550 tomahawk max WIFI.