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 ('a2e831e27ffe01fc244cc45db6ca06c5', -1, 1711673366, 1711673366, '035abb0b', 7, 0, 0)

Line : 187
File : sessions.php