phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '477e437cf2af0d0cb7829aa84743b71f' 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 ('477e437cf2af0d0cb7829aa84743b71f', -1, 1769968792, 1769968792, 'd849d822', -4, 0, 0)

Line : 187
File : sessions.php