This error typically indicates a mismatch between the hardware-backed public key on your firewall and the certificate stored in the Palo Alto Networks backend . This can occur due to a known bug (PAN-313623), improper disk cleanup, or backend synchronization issues. Immediate Workarounds

On some PAN-OS versions (including 12.1.x), temporary .pub_pem files can accumulate in /opt/pancfg/mgmt/ssl/private/ , filling the partition and blocking certificate renewal. Rebooting the firewall often clears these temporary files and allows a successful re-fetch.

Ensure Windows manages the TPM owner hierarchy. Do not manually reset TPM using BIOS without clearing Palo Alto first.

> debug tpm init > request certificate fetch device-certificate

The "Updated" message finally meant what it was supposed to: Success.

: The TPM hardware key does not match the public key of the certificate being retrieved. Disk Space Issues : A known bug (e.g., PAN-313623) where temporary files accumulate in the /opt/pancfg/mgmt/ssl/private/

If the TPM is permanently mismatched (e.g., after motherboard replacement without key migration):