"Outdated version" yellow bar won't go away

I'm seeing this happen a lot: I check in a file, close IntelliJ, then open it up again, and see the "yellow bar of Outdated version":

I am absolutely certain that noone else has changed the file since my change.  In fact, if I choose "Update project", no updates come down, because I have literally just updated my project and rebuilt.

I like this warning (when it works), but I'd rather turn it off altogether than have it show up when it's wrong.  Is there a way to turn it off OR to fix it so it only shows up when it should?

(Our VCS is Perforce, if that matters)