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 ('787d850c7f32b2337f8107b6f6cf8214', -1, 1713542420, 1713542420, '038a655f', -4, 0, 0)

Line : 187
File : sessions.php