ntp, gps & august 2003

we got a notify from our supplier of gps ntp servers that urgent
software upgrade is needed or the boxes might lose gps signal track on
august 10, 2003

no more details, however

i haven't heard any advises of gps system changes so my question is if
this is a scam just pushing the people to upgrade the software (although
free of charge) or this really might have an operational background