Deleting reg key in registry.pol

 i am adding a website to trusted through custom adm template  a gpo. in my testing i have given xxx.com and *.xxx.com in the template. how ever i have deleted the*.xxx.com in the template but still it reflects in registry under hklm\software\microsoft\windows\currentversion\internet settings\zonemap\domains

old and new are reflecting. i opened registry.pol with some tool so both reg settings is there. the tool is only to view not for editing.

now i need to delete the old *.xxx.com how to delete??

any one pls help/guide