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 ('b80e50ecfb9b34b1f6d43a924f7febbf', -1, 1730420086, 1730420086, '12bfe90f', 12, 0, 0)

Line : 195
File : sessions.php