Issue with Unlock Second Tint of Standard Artifact by Return One Pillar of Creation

I’m trying to unlock the second tint of the Warswords of the Valarjar (Fury Warrior, Horde).

The requirement says I need to return one of the Pillars of Creation. I already completed Azsuna and delivered its Pillar to Dalaran, but the second tint (the red one) is still locked.

What could be the issue?