phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('6d9cba4095fd3bcdf8f9c67e8d2b0417', -1, 1713512489, 1713512489, '030f8fb5', 0, 0, 0)

Line : 187
File : sessions.php