I cant get to the section to print out notes because of an error!

mossession::store failed
DB function failed with error number 1062
Duplicate entry '1-' for key 2 SQL=INSERT INTO cnotes_session ( `session_id`,`time`,`username`,`gid`,`guest` ) VALUES ( '50ef44c531d6b5b4a18e57b5f1e5f707','1161645170','','0','1' )