invalid swap message dedicated server

Hey guys, I have Shooter Game running with a dedicated server to test some stuff. I added a BP based inventory to the character. I have multiple clients connected to the server, lets say A, B, and C. If client A picks up an item, it resets both clients B and C player controllers and I get this error in the dedicated server console, one per client.
LogNet: Received invalid swap message with child index -1
I can not find anything on google about this error message and dont know where to go to get any information. a LogNet has to do with a networking error I believe.
I know this is vague, but I am just trying to figure out even how to find out where that error is coming from.