[drupal-support] Fatal Error Browser

[dvd]

*Hi all,

Another funny incident, I use firefox usually with my durpal site but 
decided to change over to mozilla standrad browser.
However now I have a problem with logging into my site with mozilla 
browser. Error message being as stated, anyone got
any ideas ?  I have logged out with my firefox browser.

Fatal error*: Duplicate entry '0ed2f2cbdadc8059c56e8a4f8e1b4a43' for key 
1 query: INSERT INTO sessions (sid, uid, hostname, timestamp) VALUES 
('0ed2f2cbdadc8059c56e8a4f8e1b4a43', 0, '81.173.144.93', 1130013244) in 
*dr/includes/database.mysql.inc* on line *66

Best regards.

*