Not possible to update note via SNOTE

Hi,

I've been told by our BASIS people that it is not possible to update a note (from a version to another) via SNOTE because it was implemented via SP.

I'm finding it a bit strange but can't find info on this subject hence the topic.

Is this really how it goes? If a note has been implemented through a SP I can't update it later via SNOTE?

Thank you,

Carlos