MS CRM 2016 - Interactive Service Hub - facing "There is at least one error that must be fixed before you can proceed"

Hi Team,

In MS CRM 2016 Interactive Service Hub, Knowledge Article entity i customized to server my purpose. I added few new fields.

And published. But when i come to Interactive Service Hub, it is giving below error. 

Please help me in this regards.

Thanks,

Sreenath