Brian, run this command from a Windchill shell to extract your current series: (change path as necessary)
java wt.series.LoadFileBasedSeries E:\PTC\Windchill_10.2\series.xml -read
Then on your 10.2 system, run this command to load it back in:
java wt.series.LoadFileBasedSeries E:\PTC\Windchill_10.2\series.xml -load