If you killed a second high priest (either two on Astral or first in
the Sanctum and another on Astral) the livelog/#chronicle message
would report "killed high priest of Foo (2nd time)" even though the
first was the high priest of Bar, or even just "killed high priest
(2nd time)" if second kill happened when not adjacent.
High priests pass the 'unique monster' test (even though they aren't
actually unique--there will be four of them) so get logged for killing
such. Always report "killed high priest of Foo" and only do so if the
specific high priest[ess] monster hasn't been revived and re-killed.
Logging deaths of unique monsters normally reports the 1st, 2nd, 3rd,
5th, 10th, and various later instances. If you were to kill Moloch's
high priest and all three on Astral, the last one wouldn't be logged
because 4th instance gets skipped. This forces each one to be treated
as the 1st (provided that the mrevived flag is clear), so for logging
purposes it will now behave as if there are 4 distinct high priests.