A network overlapping the requested IP range is in use by another gateway customer

Additional information

DNS policies

What is the error message?

A network overlapping the requested IP range is in use by another gateway customer.

What is the issue you’re encountering

When trying to add a DNS location for an endpoint policy I am prevented from proceeding due to this error of overlapping IP range.

What steps have you taken to resolve the issue?

I have verified that the address (that was autofilled by the configuration tool) is the correct external IP of my network.

Screenshot of the error