Invalid Product Information Upgrade Code. The Upgrade code <code> is not a valid GUID.

The specified upgrade code GUID is not valid. It has been changed from the GUID originally assigned by the installer. If you accidentally changed the upgrade code in the Product Information tab of the Project Properties dialog box, click Cancel to close the dialog box without saving the change.

To enter a new upgrade code, go to the Product Information tab of the Project Properties dialog box and click the New code button next to the Upgrade code field. The installer will assign a new upgrade code.