diff --git a/contracts/libs/Mappings.sol b/contracts/libs/Mappings.sol
index 290b2a5..06de565 100644
--- a/contracts/libs/Mappings.sol
+++ b/contracts/libs/Mappings.sol
@@ -20,17 +20,10 @@ library Mappings {
     mapping(ValueId => Value) _values;
   }
   struct Key {
-    string name;
-    bool delux;
-    uint price;
-
     EnumerableSetExtensions.ClearableBytes32Set _values;
   }
-  struct Value {
-    string name;
-    bool delux;
-    uint price;
 
+  struct Value {
     KeyId _keyId;
   }
 
@@ -118,10 +111,9 @@ library Mappings {
       success = insertKey(map, key);
       assert (success); // key insertion failure
     }
-    map._valueIds.add(ValueId.unwrap(value));
-    map._values[value]._keyId = key;
-
-    success = map._keys[key]._values.add(ValueId.unwrap(value));
+    if (!exists(map, key, value)) {
+      success = insertValue(map, key, value);
+    }
   }
 
   function deleteKey(Mapping storage map, KeyId key)
diff --git a/contracts/TestMappings.sol b/contracts/libs/TestMappings.sol
similarity index 98%
rename from contracts/TestMappings.sol
rename to contracts/libs/TestMappings.sol
index 9d60a1f..b0a2090 100644
--- a/contracts/TestMappings.sol
+++ b/contracts/libs/TestMappings.sol
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.0;
 
-import "./libs/Mappings.sol";
+import "./Mappings.sol";
 
 // exposes public functions for testing
 contract TestMappings {