With an on-call schedule with one person scheduled at all times, a single incident sends two SMS messages to the on-call person. One comes from 43105 and another from 73889.
When an incident is ACK’d or resolved, both of those numbers send updates to the on-call person.
Incident timeline shows a single notification sent to the on-call person but they receive two messages.
What can I change to have a single SMS sent instead of duplicates?