Conversion license

Hello everyone,

my customer has bought an old device where there is not license, doing a check by serial number on  F5 portal,

I have received this ionformation:

Usage                 : Production 

Product Order Status  : Sales

I need to know if it is possible to generate a new license ( buying it )  to apply to this device and if it is possible  convert a license from GTM to LTM.

Many thanks in advances for everyone for your time and consideration.

Regards,