diff --git a/source/main/physics/ActorSpawner.cpp b/source/main/physics/ActorSpawner.cpp
index ceed2c060d..688ab3c169 100644
--- a/source/main/physics/ActorSpawner.cpp
+++ b/source/main/physics/ActorSpawner.cpp
@@ -116,6 +116,8 @@ void ActorSpawner::ConfigureAddonParts(CacheEntryPtr& tuneup_entry)
         ROR_ASSERT(tuneup_entry->resource_group != "");
         ROR_ASSERT(tuneup_entry->tuneup_def != nullptr);
 
+        AddonPartUtility::ResetUnwantedAndTweakedElements(tuneup_entry->tuneup_def);
+
         for (const std::string& addonpart: tuneup_entry->tuneup_def->use_addonparts)
         {
             CacheEntryPtr addonpart_entry = App::GetCacheSystem()->FindEntryByFilename(LT_AddonPart, /*partial:*/false, addonpart);
diff --git a/source/main/resources/addonpart_fileformat/AddonPartFileFormat.cpp b/source/main/resources/addonpart_fileformat/AddonPartFileFormat.cpp
index 7d7e3a9b5f..ac64d1f177 100644
--- a/source/main/resources/addonpart_fileformat/AddonPartFileFormat.cpp
+++ b/source/main/resources/addonpart_fileformat/AddonPartFileFormat.cpp
@@ -152,6 +152,17 @@ void AddonPartUtility::ResolveUnwantedAndTweakedElements(TuneupDefPtr& tuneup, C
     }
 }
 
+void AddonPartUtility::ResetUnwantedAndTweakedElements(TuneupDefPtr& tuneup)
+{
+    ROR_ASSERT(tuneup);
+    // Unwanted
+    tuneup->remove_flexbodies.clear();
+    tuneup->remove_props.clear();
+    // Tweaked
+    tuneup->node_tweaks.clear();
+    tuneup->wheel_tweaks.clear();
+}
+
 
 // Helpers of `TransformToRigDefModule()`, they expect `m_context` to be in position:
 // These expect `m_context` to be in position:
diff --git a/source/main/resources/addonpart_fileformat/AddonPartFileFormat.h b/source/main/resources/addonpart_fileformat/AddonPartFileFormat.h
index 71d85723f4..bd44c6bd8c 100644
--- a/source/main/resources/addonpart_fileformat/AddonPartFileFormat.h
+++ b/source/main/resources/addonpart_fileformat/AddonPartFileFormat.h
@@ -50,6 +50,8 @@ class AddonPartUtility
     /// Also handles 'addonpart_tweak_*' elements, resolving possible conflicts among used parts.
     void ResolveUnwantedAndTweakedElements(TuneupDefPtr& tuneup, CacheEntryPtr& addonpart_entry);
 
+    static void ResetUnwantedAndTweakedElements(TuneupDefPtr& tuneup);
+
 private:
     // Helpers of `TransformToRigDefModule()`, they expect `m_context` to be in position:
     void ProcessManagedMaterial();