You ask really good questions
It looks as if a new tftboot directory was created as there is a tftboot.prev directory as well as the tftpboot one. That indicates to me that the new server was made from scratch, and the images that were common between the two were manually copied over.
That being said, in the pxe.config directory are entries aside from the default that carry the MAC addresses of my computers in question as well as a reference to the image 5800R2. I’ve removed these files and will try my luck with PXE again.
This is already progress from where I was, so even though you’re just asking me for more information you are indeed helping me so thank you very much.
Edit: That did the trick! Thank you!