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 ('bbc59d708fe85bb602439e0887bdce0a', -1, 1713963307, 1713963307, '1275b796', -7, 0, 0)

Line : 187
File : sessions.php