Bug Biome borders

[TakeruGrima]

Hello,

I have an issue with the generation of biomes in Gaia.  I generated 2 biomes with 2 Image Mask, but after generation it gives a weird result between those biomes, you can see the result in the screenshots bellow :

Is there a way to get rid of it, without having to manually paint the terrain because the biome generation would be random at some point in my project.