diff --git a/update/2_4_21.sql b/update/2_4_21.sql
index 15901623e..38cd8c27e 100644
--- a/update/2_4_21.sql
+++ b/update/2_4_21.sql
@@ -89,5 +89,5 @@ WHERE
         `mg_prezzi_articoli` AS `prezzi_specifica`
     WHERE
         `id_articolo` = `mg_articoli`.`id`
-) AND `id_fornitore` IS NOT NULL
+) AND `id_fornitore` IN (SELECT `idanagrafica` FROM `an_anagrafiche`)
 );
\ No newline at end of file