ipados – ”Ghost files” on my iPad in files app

In my files app on my ipad I have these ”ghosts files” on my google drive. These failes doesn’t exist on google drive, I cannot either see them from my iphone. They only exist on my ipad. Also, the don’t really exist as I cannot select/open/delete them.

The ghost files appeared when I tried to export NEF files from Lightroom in my ipad. Why did this happen and how can I remove them?
Also, how can I prevent this from happening again?

enter image description here