Velajae The Villager Blacksmith

I have a villager named Velajae. I designed it so that it would offer me things that no other country could get (its justifications appear in the video). I created a very strong emerald stone so I put it in its new level, level number 6!! At first I was thrilled that my village was finally ready, but I found that it was not going up to level six. Can you tell me how to resolve this (I use Blocktopograph to design it. And can you explain to me how I can create his own skin and create a new name for his 6 level?)