Because you've an illegal copy. Lol.
Impossible to answer without a serial number
The Serial Number Wizard is designed to provide "manufacture date" information for a guitar or bass. Not ALL serial numbers are accounted for, so if the Wizard indicates an "Invalid Serial Number", first double check the serial number on the instrument and try again. If the Wizard still indicates an "Invalid Serial Number" contact Yamaha Customer Support at: (714) 522 9000. SERIAL NUMBER DATE YEAR(S) UNIT #
yes just make sure you have a serial number for both installations
1999
There doesn't appear to be an order number for the game, Bookworm adventures deluxe. If you are looking for the serial number, this is contained with the game when purchased.
1969 starting serial number for 1969 9a39863
FEBRUARY 1974
this is the serial number:=5ggg-xr4l-6845-r845-6845=
I'm sorry, that serial number is invalid.
1969
I believe this number indicates that the guitar is an American deluxe manufactured in 2000
2004 to 2005 is the year and it's made in Mexico