diff --git a/src/main/java/net/hostsharing/hsadminng/hs/hosting/asset/HsHostingAsset.java b/src/main/java/net/hostsharing/hsadminng/hs/hosting/asset/HsHostingAsset.java
index abe56085..52e884e1 100644
--- a/src/main/java/net/hostsharing/hsadminng/hs/hosting/asset/HsHostingAsset.java
+++ b/src/main/java/net/hostsharing/hsadminng/hs/hosting/asset/HsHostingAsset.java
@@ -89,9 +89,10 @@ public abstract class HsHostingAsset implements Stringifyable, BaseEntity<HsHost
     @JoinColumn(name = "alarmcontactuuid")
     private HsOfficeContactRealEntity alarmContact;
 
+    @Builder.Default
     @OneToMany(cascade = CascadeType.REFRESH, orphanRemoval = true, fetch = FetchType.LAZY)
     @JoinColumn(name = "parentassetuuid", referencedColumnName = "uuid")
-    private List<HsHostingAssetRealEntity> subHostingAssets;
+    private List<HsHostingAssetRealEntity> subHostingAssets = new ArrayList<>();
 
     @Column(name = "identifier")
     private String identifier; // e.g. vm1234, xyz00, example.org, xyz00_abc
@@ -116,13 +117,6 @@ public abstract class HsHostingAsset implements Stringifyable, BaseEntity<HsHost
         this.isLoaded = true;
     }
 
-    public List<HsHostingAssetRealEntity> getSubHostingAssets() {
-        if (subHostingAssets == null) {
-            subHostingAssets = new ArrayList<>();
-        }
-        return subHostingAssets;
-    }
-
     public PatchableMapWrapper<Object> getConfig() {
         return PatchableMapWrapper.of(configWrapper, (newWrapper) -> {configWrapper = newWrapper;}, config);
     }