Converting Trailblazer weapon

I have a Trailblazer Note Canxion +35 trying to Convert it to another weapon and It says I do not have a Target Trail Blazer Weapon. And if I were to go to convert it to a Founder's Amphitrite, It says I have a weapon.

It's unlocked and not equipped?

@Omnomidon Yes to both

@Altoh Weird, I got nothing, then.

When it comes to Zeig's weapon-type conversions, you can only convert from another weapon to a Harmonizer, but not the other way around.

@AndrlCh alright thanks I just converted it back to a stone and ended up buying someone's Starquake Partisan out of anger. Thanks for the Info!