phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '79f8a41e8a565fae4f82ba89e68737df' 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 ('79f8a41e8a565fae4f82ba89e68737df', -1, 1777202998, 1777202998, 'd849d800', 16, 0, 0)

Line : 187
File : sessions.php