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 ('b355ea0d5ce104599eaa97d6a9c3d1d6', -1, 1711714378, 1711714378, '2cd3efb5', 3, 0, 0)

Line : 187
File : sessions.php