phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a79cfa89e3283b377a509789601bcf78' 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 ('a79cfa89e3283b377a509789601bcf78', -1, 1762305140, 1762305140, 'd849d8b0', 6, 0, 0)

Line : 187
File : sessions.php