SessionID and SQLServer Session State

[Jeff Carver]

I've been experimenting with SQLServer session state, and I'm puzzled
by something. When I use Session.SessionID to display the session ID,
I get a 24-character string, e.g.:

ayzuglzyznc4o4eplcu1h2bj

The corresponding database value
(ASPState.ASPStateTempSessions.SessionID) is a 32-character string
which equates to the 24-character Session.SessionID value plus
"00000001":

ayzuglzyznc4o4eplcu1h2bj00000001

Any idea why?