Coredata error while adding new properties

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If you created the new model from coredata and modified the properties in the model.
After that must have to delete the NSManaged subclasses for your entity and create new class and save it.

After that if your Xcode shows that property not found for the class entity files then follow the below steps. 
Quit the Xcode and relaunch.after that clear the derived data then open the xcode it will works good.

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