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 ('2c997c447bcfb6c77b7fcef724581878', -1, 1713408949, 1713408949, '12bf9dba', -9, 0, 0)

Line : 187
File : sessions.php