You could described better in your first post what your problems is, none of us here have crystal balls or are mind readers.I'm sorry you have not got my point. Let me explain it again.
I'm uploading a new logo for my site. The logo's old name was logo.png. I uploaded a new logo with the same-named logo.png and back up the old logo with backup.logo.png. But my site still showing the old logo. I thought it may be a cache issue. But I try to access by URL I mean https://site-directory/wp-content/uploads/logo.png but still showing the old logo.
Could you please help me why it's still the old logo?