Sap Screen Personas - error when saving the flavor.

Hello everyone

I created a flavor for Business Partner and made changes to simplify the screen and saved it. but when I login and logout and try to save I am getting the error as below. I have no idea on this, the only way I am getting away with this is creating a copy of it and and then saving it and it works fine for the day until I logout. but getting the same problem again. so I keep copying flavors.

any idea to get this cleared.

Regards

surendra