Please include your session config file, but I suspect it has to do with the following two directives...
Code:
tls-server
tls-auth /etc/ovpn/keys/tls-auth.key 0
tls-server, as a variant of server mode, allows for MANY tls clients. tls mode is not needed -- depending on your many-to-one or not userland -- but for the want of two correct params is recommended.
/S