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 ('c2e035ac089768b0ee7acf740b4edf40', -1, 1713460011, 1713460011, '0391baad', -2, 0, 0)

Line : 187
File : sessions.php