I have two Enterprise Portal for ArcGIS 10.7. I would like to collaborate two portal for the sharing the content, used the Create Collaboration option in Portal for ArcGIS. Successfully created the host organization but while inviting guest organization, I am getting an error "you cannot invite your organization to the collaboration. Your organization is already taking part in collaboration" .Following are the example of portal urls.
https://p1maps.domain.com/portal (Host)
https://p2maps.domain.com/portal (Guest)
Please Suggest..