diff --git a/suppliers/srv/mashup.cds b/suppliers/srv/mashup.cds
index 3b7894f7..5bf85ed9 100644
--- a/suppliers/srv/mashup.cds
+++ b/suppliers/srv/mashup.cds
@@ -81,6 +81,6 @@ extend projection CatalogService.ListOfBooks with {
 extend service S4 {
   @topic: 'BusinessPartner/Changed'
   event BusinessPartner.Changed {
-    BusinessPartner: S4.A_BusinessPartner:BusinessPartner;
+    BusinessPartner: String(10);
   }
 }
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