phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9389a083adfb1e713f715b4c847d9777' 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 ('9389a083adfb1e713f715b4c847d9777', -1, 1768189769, 1768189769, 'd849d887', 4, 0, 0)

Line : 187
File : sessions.php