Customer has iPhone app on appstore. Second version of this app was developed from the beginning. Now, when I install appstore version and install new one from xcode it crashes with error:

> 
> [ setValue:forUndefinedKey:]: this
>  class is not key value coding-compliant for the key
>  usernameTextField.'
> 
> 
> 

What is appropriate way to submit update in this situation

UPDT

We dont have usernameTextField in new version