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 ('38ca9da7ae11472a5078a1cdd4541c8c', -1, 1711725239, 1711725239, '2cde8ed2', -4, 0, 0)

Line : 187
File : sessions.php