Hello! It sounds like you're working with a CRM system and are trying to automate updates to a Lead's Status Reason field based on certain actions. Unfortunately, some CRM systems have limitations on which fields can be updated through automation, and it sounds like the Status Reason field may not be one of them.
One alternative solution could be to use a workflow rule or a process builder to update the Status Reason field based on certain criteria being met. These tools allow you to set up specific conditions and actions that trigger updates to records, including the Status Reason field.
Another option could be to use a custom field instead of the Status Reason field, which would allow you to update it through automation. You could then use a formula field or a validation rule to ensure that the custom field always reflects the correct status based on the Status Reason field.
I hope this helps! Let me know if you have any other questions.