unable to change primary domain

[visrosoftware92]

i am getting error "A system error occurred while processing this action.Error Code: C085843B" while modifing my primary domain from visrosoftware.pcriot.com to visrosoftware.com

[Jake]

This domain name looks like it is already in use? Is it added on to your package?

[visrosoftware92]

no this domain is not added on to my package, and how to check that...........