Nessus License Already In Use May 2026

Keep reinstalling Nessus hoping it works – each new install generates a new instance ID and will keep hitting the same error until the original registration is cleared.

/opt/nessus/sbin/nessuscli fetch --deregister If successful, reactivate on the new instance: nessus license already in use

Would you like a template for contacting Tenable Support to expedite the license release? Keep reinstalling Nessus hoping it works – each