Sorry for the delayed response. Got tied up with corralling the kiddo during e-learning (Yay for COVID note sarcasm) & "helping" with homework
No, the item isn't locked. It's got a circle on the image that's red. I know that a blue circle means "Not Tradable" and a yellow circle means "Account Bound", But I haven't run into a red circle before. When I hover over the circle, It says "Transactions cannot be made due to the following features in use: Weapon Transmutation (which I've taken off) & Add Unit Skill (This is the one I'm confused over, because I don't recall adding a unit skill to this particular weapon. Didn't even know that such a thing was possible).
Thanks again in advance for any & all assistance.