Well there is your problem. You have the NVIDIA graphics drivers / GL shim "installed". Likely manually because that's the only way they can be used (maybe your distribution did it automatically, but I find that doubtful); you can tell you did it through this simple question: did you use the video card's acceleration at any point? if you did (and I assume you did, since you called it a system by the brand of your video card) you have effectively told your package manager (probably through some "convenient" NVIDIA provided "installer" script):

"I really really want this package and do whatever other proprietary shit this script I didn't read thought was a good idea (like maybe put it into the system with some bizarre name) on a system that will always have this NVIDIA card in it"

And now you are trying to upgrade to something (the proper mesa gl library) which conflicts with that request. But because the package you "installed" has no information (because it's not a real package; because it's a bundle of proprietary code that NVIDIA refuses to properly support) the package manager can't really help you (it can't remove a package it doesn't know how to, so it can't remove the dependencies it's providing, so it can't add a new package with the same provided dependencies). You have to undo whatever shit that script did before you can proceed with a stable system.

Also note, what you are trying, is basically impossible with a Windows system (e.g. installing an arbitrary video driver; moving a system - without re-installation - from hardware to a virtual box system, or even hardware to hardware). So if it doesn't work... it's not like you had any other options anyway. NVIDIA assumes the Windows paradigm here, the open source systems you bludgeon with their proprietary code can do nothing to stop the bad actors you force on them from doing bad things.

I don't know the list of NVIDIA driver packages off the top of my head, or whatever bizarre shit they did to your installation, and it's not the responsibility of the Linux community to provide tech support for your hardware manufacturer. I had considered trying to be more helpful, and do some cursory research into your problem, but your attitude towards someone else that was being extremely helpful showed you don't want to be helped, you want to angry at someone. We are not your tech support, so I can tell you: Fuck off.