It's -10 twohanded sword with Claid level damage weighting
Not seeing any other properties that would cause this to not temper for enchanting
Does it have to do with the negative enchant?
I have swung it a bunch to change it over
Not sure if it could be buggy
It has been sung too

Not sure if the next step

Thank you

I imagine the anti-magic flag that prevents it from being ensorcelled also is preventing enchanting.