core data - What to do when get "The model used to open the store is incompatible with the one used to create the store"?

Question

I had a core data EntityDescription and I created data in it. Then, I changed the EntityDescription, added new one, deleted the old one using the editor for xcdatamodeld file.

Now any of my code for core data causes this error "The model used to open the store is incompatible with the one used to create the store}". The detail is below. What should I do? I prefer to remove everything in the data model and restart new one.

Thanks for any suggestion!

 reason=The model used to open the store is incompatible with the one used to create the store}, {
    metadata =     {
        NSPersistenceFrameworkVersion = 320;
        NSStoreModelVersionHashes =         {
            Promotion = <472663da d6da8cb6 ed22de03 eca7d7f4 9f692d88 a0f273b7 8db38989 0d34ba35>;
        };
        NSStoreModelVersionHashesVersion = 3;
        NSStoreModelVersionIdentifiers =         (
        );
        NSStoreType = SQLite;
        NSStoreUUID = "9D6F4C7E-53E2-476A-9829-5024691CED03";
        "_NSAutoVacuumLevel" = 2;
    };

Answer 1

Or if you're in dev mode, you can also just delete the app and run it again.