Closet system anchor coming out of wall

I have an ikea closet system I installed a couple years ago. One of the vertical rails of the system has one anchored screw at the top that is coming out of the wall. The entire rail system is installed with wall anchors, and so far all the other screws in this particular rail are fine. The other vertical segments are also all fine. Any idea how to fix this without taking the rail off? I’m concerned about how I would install it back in the exact place if I had to remove all of the wall anchors.

https://imgur.com/a/npyWTq2