Unable to change Admin Password

• An admin user attempts to make changes to the password for a local administrator user, but the changes are not taking effect. 
• Ms.log (less mp-log ms.log) outputs the following which indicates that the password file is being locked and no further changes can be applied for the admin accounts:

usermod: unable to lock password file
/usr/sbin/pwconv: can't lock passwd file

• Similar logs can also be found in Configd logs (less mp-log configd.log)

useradd: existing lock file /etc/passwd.lock with an invalid PID '#%PAM-'
useradd: cannot lock /etc/passwd; try again later.

• Palo Alto Networks Firewall or Panorama
• Any PAN-OS

1. This process requires root access.
2. Please call into support line where an engineer will assist you. 
3. Reference this article to expedite the process.