Can't Edit Description Of One Of My Images

I generally submit photography, but submitted my first Digital Art image. When filing out the description etc, I selected Digital Art for the "Medium". However, the description now reads Photography-Digital Art. The image is strictly digital art (no photography involved). Is there a way to delete "photography" from the description? I've tried everything I can think of.

http://fineartamerica.com/featured/sunset-diane-bell.html