The source server ends the session because shown target server is not defined on the source server.
The source server ends the session and continues operation.
The target server must be correctly defined before it can be accessed by the source server. Before you attempt the next operation, define the target server by using the DEFINE SERVER command.
If the target server is a replication server and its server definition was incorrectly deleted, redefine the server by using the DEFINE SERVER command before you attempt replication. However, if you intend to remove the target server from replication because it is no longer required, use the REMOVE REPLSERVER command to remove the target server from the list of replication servers.