The system number cannot be changed. and the link Allow system number to be changed is not visible.
PM8: All versions
When the System (Edit) window is opened, the system number initially cannot be edited. To edit the system number, the link Allow system number to be changed must be clicked.
If the system has been exported to Key Manager, the Allow system number to be changed link will not be shown. This is to avoid confusion for the Key Manager users also to lessen the chance of any issues when the system is imported by the Key Manager user.
Follow this procedure to show the option Allow system number to be changed:
System and then ModifyAllow system number to be changed will be visible.