Problem of texture with 3d armor (custom model)

So, all my armor is good except for one side of the helmet, there are just pixels that come from nowhere. Here it's supposed to look like this : https://imgur.com/a/CWQRdnW

But it looks like this instead : https://imgur.com/a/iVh4dBj

Here is the texture : https://imgur.com/a/hE7TXFD

And the model in .JAVA : https://www.mediafire.com/file/4d4x4agxy62946b/FeitanArmorV1Model.java/file

So if anyone can help I put all the infos I thought would be useful to solve it.