I wonder what you mean by "dunning data is deleted ".
Do you just mean you make the fields empty?
I am not aware that there is any standard option to erase a vendor master view from a system.
About what IDOC are you talking?
Anyhow, this error certainly means that the vendor in your satellite system got maintained with dunning area data. Logon to that system, use XK02 or FK02 and go to the correspondence view. You will see a button there for dunning area. Here you need to remove all lines but the default first line.