The earliest recollection of this bug is traced back to PAN-OS 11.1.6 - July 31, 2026. When you enable Advanced Routing and configure a BGP Authentication profile, if you configure a Secret that includes any special characters apart from these seven special characters !@#%^_-, an error message displays, indicating that The value in this field is invalid. Workaround: Don't include any special character apart from the !@#%^_- characters in the Secret for a BGP Authentication profile. For more information: https://docs.paloaltonetworks.com/pan-os/11-1/pan-os-release-notes/pan-os-11-1-6-known-and-addressed-issues/pan-os-11-1-6-known-issues