diff --git a/src/Map.cc b/src/Map.cc
index b09d549e..ff8a7b70 100644
--- a/src/Map.cc
+++ b/src/Map.cc
@@ -1480,23 +1480,29 @@ void Map::add_event(uint32_t event_id, uint16_t flags, uint8_t floor, uint16_t s
   ev.flags = flags;
   ev.floor = floor;
   ev.action_stream_offset = action_stream_offset;
-  uint64_t k = (static_cast<uint64_t>(floor) << 32) | event_id;
-  if (!this->floor_and_event_id_to_index.emplace(k, index).second) {
-    this->log.warning("Duplicate event ID: W-%02hhX-%" PRIX32, floor, event_id);
-  }
 
+  uint64_t k = (static_cast<uint64_t>(floor) << 32) | event_id;
+  this->floor_and_event_id_to_index.emplace(k, index);
   k = section_index_key(floor, section, wave_number);
   this->floor_section_and_wave_number_to_event_index.emplace(k, index);
 }
 
-Map::Event& Map::get_event(uint8_t floor, uint32_t event_id) {
+vector<Map::Event*> Map::get_events(uint8_t floor, uint32_t event_id) {
   uint64_t k = (static_cast<uint64_t>(floor) << 32) | event_id;
-  return this->events.at(this->floor_and_event_id_to_index.at(k));
+  vector<Event*> ret;
+  for (auto its = this->floor_and_event_id_to_index.equal_range(k); its.first != its.second; its.first++) {
+    ret.emplace_back(&this->events.at(its.first->second));
+  }
+  return ret;
 }
 
-const Map::Event& Map::get_event(uint8_t floor, uint32_t event_id) const {
+vector<const Map::Event*> Map::get_events(uint8_t floor, uint32_t event_id) const {
   uint64_t k = (static_cast<uint64_t>(floor) << 32) | event_id;
-  return this->events.at(this->floor_and_event_id_to_index.at(k));
+  vector<const Event*> ret;
+  for (auto its = this->floor_and_event_id_to_index.equal_range(k); its.first != its.second; its.first++) {
+    ret.emplace_back(&this->events.at(its.first->second));
+  }
+  return ret;
 }
 
 void Map::add_events_from_map_data(uint8_t floor, const void* data, size_t size) {
diff --git a/src/Map.hh b/src/Map.hh
index cd970812..375e7546 100644
--- a/src/Map.hh
+++ b/src/Map.hh
@@ -330,8 +330,8 @@ struct Map {
       uint16_t section,
       uint16_t wave_number,
       uint32_t action_stream_offset);
-  Event& get_event(uint8_t floor, uint32_t event_id);
-  const Event& get_event(uint8_t floor, uint32_t event_id) const;
+  std::vector<Event*> get_events(uint8_t floor, uint32_t event_id);
+  std::vector<const Event*> get_events(uint8_t floor, uint32_t event_id) const;
   void add_events_from_map_data(uint8_t floor, const void* data, size_t size);
 
   struct DATSectionsForFloor {
@@ -373,7 +373,7 @@ struct Map {
   std::vector<size_t> rare_enemy_indexes;
   std::vector<Event> events;
   std::string event_action_stream;
-  std::map<uint64_t, size_t> floor_and_event_id_to_index;
+  std::multimap<uint64_t, size_t> floor_and_event_id_to_index;
   std::unordered_multimap<uint64_t, size_t> floor_section_and_group_to_object_index;
   std::unordered_multimap<uint64_t, size_t> floor_section_and_wave_number_to_enemy_index;
   std::unordered_multimap<uint64_t, size_t> floor_section_and_wave_number_to_event_index;
diff --git a/src/ReceiveSubcommands.cc b/src/ReceiveSubcommands.cc
index 87287adc..c390bacb 100644
--- a/src/ReceiveSubcommands.cc
+++ b/src/ReceiveSubcommands.cc
@@ -2924,12 +2924,12 @@ static void on_trigger_set_event(shared_ptr<Client> c, uint8_t command, uint8_t
 
   const auto& cmd = check_size_t<G_TriggerSetEvent_6x67>(data, size);
   if (l->map) {
-    try {
-      l->map->get_event(cmd.floor, cmd.event_id).flags |= 0x04;
-      l->log.info("Client triggered set event W-%02" PRIX32 "-%" PRIX32, cmd.floor.load(), cmd.event_id.load());
-    } catch (const out_of_range&) {
-      l->log.warning("Client triggered missing set event W-%02" PRIX32 "-%" PRIX32, cmd.floor.load(), cmd.event_id.load());
+    auto events = l->map->get_events(cmd.floor, cmd.event_id);
+    for (auto* event : events) {
+      event->flags |= 0x04;
     }
+    l->log.info("Client triggered set event W-%02" PRIX32 "-%" PRIX32 " (%zu events)",
+        cmd.floor.load(), cmd.event_id.load(), events.size());
   }
 
   forward_subcommand(c, command, flag, data, size);