Administrator Favicon didn't update

Hi,
The favicon has been uploaded to /administrator/templates/atum/
Why the Favicon didn't update in Joomla back-end?

Thanks

The administrator template will take these favicon files:

/media/system/images/joomla-favicon.svg
/media/system/images/favicon.ico
/media/system/images/joomla-favicon-pinned.svg

You can replace these images by your own.

I had replaced all favicon files but no luck.Any idea?
Thanks

rmesceo You need to clear cache on your site and on your server if you have cache enabled there and browser's cache also.