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) VALUES ('a2dd0bce0bfaee5f8d3e639f93ebe486', -1, 1714345758, 1714345758, '038e7cfc', 4, 0)

Line : 158
File : sessions.php