Missing camo texture of minigun

[RealMadrid14]

Here it is,I forked Jbleezy's BO2 reimagined, and I want to add all the map exclusive weapons to all maps(for example the death machine in MOTD),the problem is: there is no camo after I pack a punched the death machine in other maps
To fix it,here is my steps:
1:I used Unlinker to decompile the material,image and camo json files from common_mp.ff,put them into corresponding folders
2:I added "camo,camo_minigun" to the zone files of all maps, and converted the required images to iwi format then placed them in the folder based on the console error messages from build.bat until there were no error messages in the console.
after I did all this,the minigun's texture is totally corrputed,like this

So how can I fix it?I would be most grateful for your help