Display Name Change - Unable to save your form changes The form contains invalid properties or an error has occurred.

[JamesMitchell8]

Hello,

I have a field named 'direction' with a domain set with North, South etc

When i change the 'Display name' in field maps to something else, even 'Direction:' i get the error  Unable to save your form changes The form contains invalid properties or an error has occurred.

Is there any solution to this issue?

Thanks

James