diff --git a/deployment/hasura/migrations/Aerie/11_external_events/down.sql b/deployment/hasura/migrations/Aerie/11_external_events/down.sql
index 6a9f1faddf..5280dfe186 100644
--- a/deployment/hasura/migrations/Aerie/11_external_events/down.sql
+++ b/deployment/hasura/migrations/Aerie/11_external_events/down.sql
@@ -1,24 +1,31 @@
 -- up.sql creates table and sequence, delete them
-drop trigger refresh_derived_events_on_external_event on merlin.external_event;
-drop trigger refresh_derived_events_on_external_source on merlin.external_source;
 drop trigger refresh_derived_events_on_derivation_group on merlin.derivation_group;
+drop trigger refresh_derived_events_on_external_source on merlin.external_source;
+drop trigger refresh_derived_events_on_external_event on merlin.external_event;
 drop function merlin.refresh_derived_events_on_trigger cascade;
 drop materialized view merlin.derived_events;
+
 drop function merlin.subtract_later_ranges cascade;
-drop trigger check_external_event_boundaries on merlin.external_event;
-drop function merlin.check_external_event_boundaries cascade;
+
 drop trigger external_source_pdg_association_delete on merlin.external_source;
 drop function merlin.external_source_pdg_association_delete cascade;
 drop trigger external_source_pdg_ack_update on merlin.external_source;
 drop function merlin.external_source_pdg_ack_update cascade;
+
 drop trigger pdg_update_ack_at on merlin.plan_derivation_group;
 drop function merlin.pdg_update_ack_at cascade;
 drop table merlin.plan_derivation_group cascade;
+
+drop trigger check_external_event_boundaries on merlin.external_event;
+drop function merlin.check_external_event_boundaries cascade;
+
 drop trigger check_external_event_duration_is_nonnegative_trigger on merlin.external_event;
 drop table merlin.external_event cascade;
+
 drop trigger external_source_type_matches_dg_on_add on merlin.external_source;
 drop function merlin.external_source_type_matches_dg_on_add;
 drop table merlin.external_source cascade;
+
 drop table merlin.derivation_group cascade;
 drop table merlin.external_event_type cascade;
 drop table merlin.external_source_type cascade;
diff --git a/deployment/hasura/migrations/Aerie/11_external_events/up.sql b/deployment/hasura/migrations/Aerie/11_external_events/up.sql
index f2bf2d29ab..44dfe85c9e 100644
--- a/deployment/hasura/migrations/Aerie/11_external_events/up.sql
+++ b/deployment/hasura/migrations/Aerie/11_external_events/up.sql
@@ -240,6 +240,22 @@ comment on column merlin.plan_derivation_group.derivation_group_name is e''
 comment on column merlin.plan_derivation_group.last_acknowledged_at is e''
   'The time at which changes to the derivation group were last acknowledged.';
 
+-- update last_acknowledged whenever acknowledged is set to true
+create function merlin.pdg_update_ack_at()
+  returns trigger
+  language plpgsql as $$
+begin
+  if new.acknowledged = true then
+    new.last_acknowledged_at = now();
+  end if;
+  return new;
+end;
+$$;
+
+create trigger pdg_update_ack_at
+before update on merlin.plan_derivation_group
+  for each row execute function merlin.pdg_update_ack_at();
+
 -- if an external source is linked to a plan it cannot be deleted
 create function merlin.external_source_pdg_association_delete()
   returns trigger
@@ -272,22 +288,6 @@ create trigger external_source_pdg_ack_update
 after insert on merlin.external_source
   for each row execute function merlin.external_source_pdg_ack_update();
 
--- update last_acknowledged whenever acknowledged is set to true
-create function merlin.pdg_update_ack_at()
-  returns trigger
-  language plpgsql as $$
-begin
-  if new.acknowledged = true then
-    new.last_acknowledged_at = now();
-  end if;
-  return new;
-end;
-$$;
-
-create trigger pdg_update_ack_at
-before update on merlin.plan_derivation_group
-  for each row execute function merlin.pdg_update_ack_at();
-
 create function merlin.subtract_later_ranges(curr_date tstzmultirange, later_dates tstzmultirange[])
 returns tstzmultirange
 immutable