Character Merge After Transfer

#1

I had transfered my dk named Zinaida-Dunemaul and it is now called Zinovia-TwistingNether. I tried using the manual merge but it says it can’t find any characters that can be merged.
https://www.warcraftlogs.com/character/eu/twisting-nether/zinovia
https://www.warcraftlogs.com/character/eu/dunemaul/zinaida