diff --git a/db/migrate/20241203101328_add_vat_category_id_to_tarifs.rb b/db/migrate/20241203101328_add_vat_category_id_to_tarifs.rb
index fc5bed859..b59560c00 100644
--- a/db/migrate/20241203101328_add_vat_category_id_to_tarifs.rb
+++ b/db/migrate/20241203101328_add_vat_category_id_to_tarifs.rb
@@ -20,7 +20,7 @@ def change
   def migrate_tarif(tarif)
     return if !tarif.respond_to?(:vat) || tarif.vat.blank?
 
-    vat_category = organisation.vat_categories.find_or_create_by!(percentage: tarif.vat)
+    vat_category = tarif.organisation.vat_categories.find_or_create_by!(percentage: tarif.vat)
     tarif.update(vat_category:)
     tarif.invoice_parts.find_each { |invoice_part| invoice_part.update(vat_category:)  }
   end