phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'cc4e05bf6e5ecf70e8048d723e89e5d0' for key 1

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('cc4e05bf6e5ecf70e8048d723e89e5d0', -1, 1422353986, 1422353986, '36a3b36c', -1, 0, 0)

Line : 187
File : sessions.php