How to customize Data Set name in Adobe Illustrator

Hi,

I'm using variable in Adobe  Illustrator, when i import CSV, there will auto-generate my data set name to "Data Set 1", "Data Set 2", any change to remove the "Data Set" in the name?

Bacause after that I will use Action>Batch to export my artwork, and I hope my file name is "filename-1", "filename-2", but when I choose File + Number, it generate "filename-000001", "filename-000002", it is too many 0 for me. XD

Hope and appreciate for help.