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 ('fc2792a7315e38fd53d325b28d9b0394', -1, 1714035089, 1714035089, '12d8baa4', 6, 0, 0)

Line : 187
File : sessions.php