phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '83c7cb23a3e6c8c507d6ae5dc2804a92' 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 ('83c7cb23a3e6c8c507d6ae5dc2804a92', -1, 1770639224, 1770639224, 'd849d821', 3, 0, 0)

Line : 187
File : sessions.php