diff --git a/prototype/src/main/java/org/hso/ecommerce/entities/supplier/ArticleOffer.java b/prototype/src/main/java/org/hso/ecommerce/entities/supplier/ArticleOffer.java
index 8c20099..41296ba 100644
--- a/prototype/src/main/java/org/hso/ecommerce/entities/supplier/ArticleOffer.java
+++ b/prototype/src/main/java/org/hso/ecommerce/entities/supplier/ArticleOffer.java
@@ -28,6 +28,6 @@ public class ArticleOffer {
 
     public boolean shouldBeAdvertised;
     
-    @ManyToOne(optional = false)
+    @ManyToOne(optional = true)
     public Supplier cheapestSupplier;
 }