Site "%1" (%2) is trying to report to a site that already reports to site "%1". This configuration is illegal because it ...

%11Site "%1" (%2) is trying to report to a site that already reports to site "%1". This configuration is illegal because it creates a "loop" in the site hierarchy.

Solution: Configure the site hierarchy properly; it must not contain loops. See the ConfigMgr documentation for information on how to create a proper site hierarchy.%0