title: What to do when get "The model used to open the store is incompatible with the one used to create the store"?
body: <p>I had a core data <code>EntityDescription</code> and I created data in it.  Then, I changed the <code>EntityDescription</code>, added new one, deleted the old one using the editor for <code>xcdatamodeld</code> file.</p>
  
  <p>Now any of my code for core data causes this error <code>"The model used to open the store is incompatible with the one used to create the store}"</code>. The detail is below.  What should I do?  I prefer to remove everything in the data model and restart new one. </p>
  
  <p>Thanks for any suggestion!</p>
  
  <pre><code> reason=The model used to open the store is incompatible with the one used to create the store}, {
      metadata =     {
          NSPersistenceFrameworkVersion = 320;
          NSStoreModelVersionHashes =         {
              Promotion = &lt;472663da d6da8cb6 ed22de03 eca7d7f4 9f692d88 a0f273b7 8db38989 0d34ba35&gt;;
          };
          NSStoreModelVersionHashesVersion = 3;
          NSStoreModelVersionIdentifiers =         (
          );
          NSStoreType = SQLite;
          NSStoreUUID = "9D6F4C7E-53E2-476A-9829-5024691CED03";
          "_NSAutoVacuumLevel" = 2;
      };
  </code></pre>