Hello. I have been trying to remove an extension on the Mitel 3300 ICP via the web interface but I get the following error message: Deprogram Generic group alert programmed on it before deassigning acd set. I checked under "User and Services Configuration > Keys" and found that a Generic Group Alert was set on one of the keys so I deleted it then tried to remove the extension but still get the same error message. Would could be causing this issue?