phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '747f9dd13d04e65f420f4d1fa98e9918' 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 ('747f9dd13d04e65f420f4d1fa98e9918', -1, 1766120204, 1766120204, 'd849d817', -4, 0, 0)

Line : 187
File : sessions.php