Rider keeps updating cache on a file with no index

Hi,

I have a file that is autogenerated in my project and I want to prevent Rider from caching it. 

I used the “Tools - Stop index” option from the context menu, and invalidated caches several times, but then after the file is regenerated (almost every build) it still recaches it. This then slows down Riders so I have to wait for the operation to end. Since the file is quite large it can take up a lot of time and having to wait for that almost every build is quite frustrating.

Is there no way to tell Rider to completely ignore this file?

Kind regards

Antun