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 ('c4ad644450a3c6728bab6e84e7b8c20c', -1, 1747938724, 1747938724, '12bc6316', 2, 0, 0)

Line : 190
File : sessions.php