ID color map is not baking right

[Mimosenherkules]

Hey,

I moddeld a sword and started wanted to texture it. When i bake my ID map it, it got wierd and i couln´t fix it.

These color artifacts appear when i  try to bake it!

What can i do?

I would be grateful if someone could help me.

[Mimosenherkules]

i used blender, i took the vertex color as ID color