The Global Mirror RSESSION DEFINE request was issued to an LSS that already has the specified session defined, or the maximum number of Global Mirror sessions has been reached for the specified LSS.
The command is rejected.
Verify that the request was issued to the correct LSS, or UNDEFINE any unwanted sessions defined to the requested LSS (see hardware information for the current allowed maximum number of sessions per LSS). After making any changes or corrections, resubmit the request.
Peer-To-Peer Remote Copy (PPRC).