TOSIBOX® Key says "no rights to serialize" when doing a serialization

“No rights to serialize” message means that the Key is serialized to the Lock as a Sub Key and does not have serialization rights. Currently the Key that was serialized to the Lock using the Lock’s USB port is the only Key that has serialization rights.
Related pages:

• The use of the service port of the Lock
• Removing the serializations from the Lock
• The Key led flickers whilst serializing or the Key won’t serialize