The Profile Marker Manager specifies a default duplication mode
that is used for the markers it creates when the scenario (or
servlet bean) used to add the marker doesn’t provide an
alternate mode. The Profile Marker Manager accepts three values
for the defaultDuplicationMode property:  When a Profile Marker
Manager is prompted to create a marker that is identical to one
that already exists in a given profile, the Profile Marker
Manager can discard the new marker (NO_DUPLICATES), replace the
original with the duplicate (REPLACE_DUPLICATES),or accept the
new marker in addition to the original (ALLOW_DUPLICATES). Fewer
markers cause quicker response in queries for a particular
marker in a profile, but may slow the marker creation and
removal processes.  You can change your duplication mode at any
time. If the Profile Marker Manager previously permitted
duplicate markers (ALLOW_DUPLICATES), you can adjust it to
replace all old markers with a new duplicate
(REPLACE_DUPLICATES).  When you specify a preference for