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 ('702fe50880eddd1751a9eed78bba0c5b', -1, 1714693183, 1714693183, '038cb9aa', -4, 0, 0)

Line : 187
File : sessions.php