Error 10048 when pairing with phone on windows

[ZakOps2]

[Errno 10048] error while attempting to bind on address ('127.0.0.1', 49151): [winerror 10048] only one usage of each socket address (protocol/network address/port) is normally permitted appears when pairing, and it disconnects afterwards

[Ra2-IFV]

try other ports or you already have one instance running on the same port