Error doing sbc!!

Hey guys atm when I go to complete most sbcs ea keep saying that some of the players I'm putting in are "in evolutions" (meaning I am using them for an in progress evolution) I am NOT using them in any evolution and it's only on specific players! I go to replace them but still doesn't work! Really annoying as can't complete any sbcs! Anyone had anything similar? Ea sort it out ffs!