Since the old Pawn of the player is already destroyed when he logs out, you need to recreate a new Pawn for him. Just “restore” or recreate the old state of the Pawn when he last logs out (i.e., bring back the old items from his inventory that is saved and being keep tracked on your PlayerState - i hope).
Basically, the things that you need to persist when the player logs out (i.e., items he was carrying, his health, etc…) needs to be saved on your PlayerState. So when he logs back, just recreate those on a new Pawn as if he didn’t realize that his Pawn was new because the state was restored.