Css changes keep "reseting"

hy !
i make some changes in css. These changes also shown. But the problem is that when i refresh the browser almost 4th or 5th time, all changes reset. Maybe some other file override file or something else.I am changing on live site .
css min file name is ::k6xy928cti3xyi6gw71n9px0dy1xfzxh5wvftgzjwgs.min.css
nop-version :: 4.02

plz help me out.
Thanks.

That is only a temporary file created as a result of bundling and minification settings.
You need to edit the original .css file in the theme folder.
Then restart the website / clear your browser cache to see the changes
Also see CSS bundling and minification in Settings
See yourwebsite.com/Admin/Setting/GeneralCommon