diff --git a/services/resourcemanager/src/main/java/cloud/stackit/sdk/resourcemanager/model/LifecycleState.java b/services/resourcemanager/src/main/java/cloud/stackit/sdk/resourcemanager/model/LifecycleState.java
index 186b7d3..4c0ffa1 100644
--- a/services/resourcemanager/src/main/java/cloud/stackit/sdk/resourcemanager/model/LifecycleState.java
+++ b/services/resourcemanager/src/main/java/cloud/stackit/sdk/resourcemanager/model/LifecycleState.java
@@ -35,7 +35,9 @@ public enum LifecycleState {
   
   DELETING("DELETING"),
   
-  INACTIVE("INACTIVE");
+  INACTIVE("INACTIVE"),
+  
+  UNKNOWN_DEFAULT_OPEN_API("unknown_default_open_api");
 
   private String value;
 
@@ -58,7 +60,7 @@ public static LifecycleState fromValue(String value) {
         return b;
       }
     }
-    throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    return UNKNOWN_DEFAULT_OPEN_API;
   }
 
   public static class Adapter extends TypeAdapter<LifecycleState> {
diff --git a/services/resourcemanager/src/main/java/cloud/stackit/sdk/resourcemanager/model/Parent.java b/services/resourcemanager/src/main/java/cloud/stackit/sdk/resourcemanager/model/Parent.java
index 29b34df..55b980d 100644
--- a/services/resourcemanager/src/main/java/cloud/stackit/sdk/resourcemanager/model/Parent.java
+++ b/services/resourcemanager/src/main/java/cloud/stackit/sdk/resourcemanager/model/Parent.java
@@ -68,7 +68,9 @@ public class Parent {
   public enum TypeEnum {
     ORGANIZATION("ORGANIZATION"),
     
-    FOLDER("FOLDER");
+    FOLDER("FOLDER"),
+    
+    UNKNOWN_DEFAULT_OPEN_API("unknown_default_open_api");
 
     private String value;
 
@@ -91,7 +93,7 @@ public static TypeEnum fromValue(String value) {
           return b;
         }
       }
-      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+      return UNKNOWN_DEFAULT_OPEN_API;
     }
 
     public static class Adapter extends TypeAdapter<TypeEnum> {
diff --git a/services/resourcemanager/src/main/java/cloud/stackit/sdk/resourcemanager/model/ParentListInner.java b/services/resourcemanager/src/main/java/cloud/stackit/sdk/resourcemanager/model/ParentListInner.java
index 520421d..d5c61dc 100644
--- a/services/resourcemanager/src/main/java/cloud/stackit/sdk/resourcemanager/model/ParentListInner.java
+++ b/services/resourcemanager/src/main/java/cloud/stackit/sdk/resourcemanager/model/ParentListInner.java
@@ -83,7 +83,9 @@ public class ParentListInner {
   public enum TypeEnum {
     FOLDER("FOLDER"),
     
-    ORGANIZATION("ORGANIZATION");
+    ORGANIZATION("ORGANIZATION"),
+    
+    UNKNOWN_DEFAULT_OPEN_API("unknown_default_open_api");
 
     private String value;
 
@@ -106,7 +108,7 @@ public static TypeEnum fromValue(String value) {
           return b;
         }
       }
-      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+      return UNKNOWN_DEFAULT_OPEN_API;
     }
 
     public static class Adapter extends TypeAdapter<TypeEnum> {