diff --git a/src/Library/CreatureData/CreatureSpecies.hpp b/src/Library/CreatureData/CreatureSpecies.hpp
index 6302b44..9fd4bf2 100644
--- a/src/Library/CreatureData/CreatureSpecies.hpp
+++ b/src/Library/CreatureData/CreatureSpecies.hpp
@@ -40,7 +40,13 @@ namespace CreatureLib::Library {
         [[nodiscard]] Gender GetRandomGender(Core::Random& rand) const;
         [[nodiscard]] const std::string& GetName() const;
 
-        void SetVariant(const std::string& name, const SpeciesVariant* variant) { _variants.insert({name, variant}); }
+        void SetVariant(const std::string& name, const SpeciesVariant* variant) {
+            auto find = _variants.find(name);
+            if (find != _variants.end()) {
+                delete find->second;
+            }
+            _variants[name] = variant;
+        }
     };
 }