Hi,
in my solution I had extension fields and one extension scenario. After I successfully deployed solution new requirement came - this extension field should also be available via "this" web service. So I created a patch and when I wanted to thick checkbox before that web service in process extension scenario and try to save it, it gave me following error.
I tried to create another process extension scenario that includes just missing web service, but looks like extension field can have only one process extension scenario.
Help, advice?