Game says Sunset items can't be used as "transfer material". Need clarification

So my understanding is that using an item as a transfer material is necessary to transfer your honing progress from one set to another. Did I just screw myself by transfering my t3 +9s to the abyssal set? Or will I be able to transfer those honings again when/if I find or make better base gear?

Sorry to dissapoint, but there’s no better gear. You’re changing it for the yellow one at 1370. This abyssal set is dogshit.

Now there’s no reason why it wouldn’t be able to be transfered into a +0 legendary.