phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '4dbe842cdb2408d1c9ec0c579452f4c1' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('4dbe842cdb2408d1c9ec0c579452f4c1', -1, 1769990632, 1769990632, 'd849d817', -4, 0, 0)

Line : 187
File : sessions.php