How to generate custom routine for program SAPFV60C in QAS (non-modifiable)

Hi ABAP Experts,

I have copied an standard routine 003 "Single Invoice" in VTFL to a custom routine 902 "NZ EDI Single Inv" to create one invoice per one reference document (delivery) for only sales org NZE0 as below.

In DEV, it was successfully generated for program SAPFV60C with message "Program SAPFV60C successfully generated".

After  moving the routine to QAS (non-modifiable system), VF04 cannot execute because the routine does not exist.

Could you please advise what else I should do to resolve the issue ?

Thanks and regards,

Danny