st: Unwanted label on scatter plots

["Wagner, Joseph" <WagnerJ@edc.pitt.edu>]

I'm using STATA v8.2 and I have a simple scatter plot

twoway (scatter viral age) by(race)

Unfortunately, I'm getting this label at the bottom left of this plot:

Graphs by race


Why am I getting this label and how do I get rid of it?

It isn't an x-axis label, nor is it a caption or legend label.
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