Plesk 10.X fails to start after upgrade !

Service of the sw-cp-server cannot be started after the Parallels Plesk Panel upgrade. The sw-cp-server fails to start with the following error: /etc/init.d/sw-cp-server start Starting SWsoft control panels server…Duplicate config variable in conditional 0 global: var.sso_username 2011-04-14 05:48:16: (configfile.c.838) source: /usr/share/sw-cp-server/ line: 72 pos: 11 parser failed somehow near here: (EOL) 2011-04-14 05:48:16: (configfile.c.838) source: […]