Ghost Data Asset visible in Content Browser doesn't exist

Hi, I am having an issue with plugin null generated files. A plugin generated data asset files in my Content browser. Quick rundown…

• 6 Data Asset files visible in the Content Browser
• When clicked they “Fail to load”
• They do NOT exist in Windows Explorer
• Fails my builds

Things I’ve tried

• Creating an empty .uasset file in the Content folder
• Creating empty filename.asset files for each null file
• Full rebuild of the project, removing VS files, saved, intermediate etc
• Copying a file of the same name in Content Browser
• Removing Asset Registry
• Via the same code, creating another null object

At this point I’m getting slightly desperate, any idea what I could do, please?
Thank you!

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