Hi, I am trying to remove a Central DNS server from our expand system as PBAS now handles all our DNS queries. However I am unable to remove it via the interface. I have de-assigned all plesk servers from the DNS server but when I attempt to remove the Central DNS server I get the following error. <errcode>4000</errcode> <errtext>Cannot delete or update a parent row: a foreign key constraint fails (`expand/cdns_recursion_instance`, CONSTRAINT `cdns_recursion_instance_ibfk_3` FOREIGN KEY (`dns_server_id`) REFERENCES `dns_serve. Error query: DELETE FROM dns_server WHERE id = 1</errtext> Also our expand server is under very heavy load from Mysql since de-assigning plesk servers from CDNS. Many queries running relating to cdns. Appreciate any advice you may have on resolving this issue.