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 ('191948e88d9b66f51f2cecfc471677b6', -1, 1714612431, 1714612431, '12d9dc72', -52, 0, 0)

Line : 187
File : sessions.php