upgrade UI

backend/services/lotDb.js

@@ -27,6 +27,7 @@ const LotDb = class
 
     async post(newDocument)
     {
+        delete newDocument._id;
         let result = await this.collection.insertOne(newDocument);
         return result;
     }

backend/services/saleDb.js

@@ -27,6 +27,7 @@ const SaleDb = class
 
     async post(newDocument)
     {
+        delete newDocument._id;
         let result = await this.collection.insertOne(newDocument);
         return result;
     }