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 ('8365a82fc730cbca7a60d08a7a4d1226', -1, 1714018896, 1714018896, '12da8164', 3, 0, 0)

Line : 187
File : sessions.php