error in building the project...

why there’s an error while im building my project it says that “moving file failed”
moving temp/stagingarea/data to C:/Users/user/Document/New Unity Project6 esting_data? thanks in advance…

I get this every once in a while. For me, I just click “Try Again” and it works. I’ve examined the contents of the folder after clicking “Try Again”, and compared it to the contents of the folder when the error is not thrown, and they are the same.