diff --git a/source/GameInterface.Tests/Serialization/SerializerTests/HeroSerializationTest.cs b/source/GameInterface.Tests/Serialization/SerializerTests/HeroSerializationTest.cs
index fb8e11e98..da2f64f54 100644
--- a/source/GameInterface.Tests/Serialization/SerializerTests/HeroSerializationTest.cs
+++ b/source/GameInterface.Tests/Serialization/SerializerTests/HeroSerializationTest.cs
@@ -23,6 +23,8 @@
 using Xunit.Abstractions;
 using Common.Serialization;
 using TaleWorlds.CampaignSystem.Actions;
+using Common.Util;
+using TaleWorlds.CampaignSystem.Roster;
 
 namespace GameInterface.Tests.Serialization.SerializerTests
 {
@@ -81,6 +83,7 @@ public void Hero_Full_Serialization()
             var objectManager = container.Resolve<IObjectManager>();
             HeroFactory.RandomHeroWithData heroData = HeroFactory.CreateRandomHero(objectManager);
             Hero hero = heroData.Hero;
+            
 
             // Setup serialization
             var factory = container.Resolve<IBinaryPackageFactory>();
@@ -347,6 +350,11 @@ private void CreateParty()
                 HeroParty = (MobileParty)FormatterServices.GetUninitializedObject(typeof(MobileParty));
                 HeroParty.StringId = "My Party";
                 HeroParty.SetCustomName(new TextObject("My Party"));
+
+                HeroParty.Party = ObjectHelper.SkipConstructor<PartyBase>();
+                HeroParty.Party.MemberRoster = new TroopRoster();
+                HeroParty.Party.PrisonRoster = new TroopRoster();
+
                 objectManager.AddExisting(HeroParty.StringId, HeroParty);
 
                 PartyBelongedToAsPrisoner = (PartyBase)FormatterServices.GetUninitializedObject(typeof(PartyBase));
@@ -357,6 +365,7 @@ private void CreateCharacterObject()
                 CharacterObject = (CharacterObject)FormatterServices.GetUninitializedObject(typeof(CharacterObject));
                 CharacterObject.StringId = "My CharacterObject";
                 CharacterObject._basicName = new TextObject("My CharacterObject");
+                CharacterObject.UpgradeTargets = new CharacterObject[0];
                 objectManager.AddExisting(CharacterObject.StringId, CharacterObject);
             }
 
diff --git a/source/GameInterface/Serialization/External/TroopRosterBinaryPackage.cs b/source/GameInterface/Serialization/External/TroopRosterBinaryPackage.cs
index 14a3ef0fc..e6215441d 100644
--- a/source/GameInterface/Serialization/External/TroopRosterBinaryPackage.cs
+++ b/source/GameInterface/Serialization/External/TroopRosterBinaryPackage.cs
@@ -4,6 +4,7 @@
 using System.Reflection;
 using TaleWorlds.CampaignSystem.Party;
 using TaleWorlds.CampaignSystem.Roster;
+using TaleWorlds.Library;
 
 namespace GameInterface.Serialization.External
 {
@@ -37,6 +38,9 @@ protected override void UnpackInternal()
             {
                 Object.NumberChangedCallback = Object.OwnerParty.MemberRosterNumberChanged;
             }
+
+            Object._troopRosterElements = new MBList<TroopRosterElement>();
+            Object.VersionNo = -1;
         }
     }
 }