What is the meaning of a mordent on top of a sharp sign?

[Kenneth Wolcott]

Hi;

  I'm trying to engrave a Piano arrangement of JS Bach, Six Little
Preludes, Nr 1, where the left hand notes have a strange thing I've
never seen before, a mordent on top of a sharp sign.

  I've never seen these symbols together in this manner.

  I have a screenshot attached.

Thanks,
Ken Wolcott