You can try copying the asset and then importing it back in.
In Content Manager, Open the asset in File Explorer.
Go to your editing folder.
Copy the kuid-named folder to your desktop. <kuid:523:1128>, for example becomes kuid 523 1128.
Revert this asset to original since you can't edit it directly.
In the copy on your desktop, edit config.txt and update the kuid to the :1 version.
Save and close the config.txt.
Import this asset back by dragging and dropping in Content Manager.
The concern I have is you will need to run PEV's Image2TGA to repair any textures. This may or may not work due to the compressed or locked textures in the assets.
After running PEV's Images2TGA, assuming it worked, submit your asset in Content Manager.