diff --git a/src/vt/trace/trace_lite.cc b/src/vt/trace/trace_lite.cc
index 8777585e4b..db68dcd6e2 100644
--- a/src/vt/trace/trace_lite.cc
+++ b/src/vt/trace/trace_lite.cc
@@ -543,6 +543,10 @@ void TraceLite::flushTracesFile(bool useGlobalSync) {
 void TraceLite::writeTracesFile(int flush, bool is_incremental_flush) {
   auto const node = theContext()->getNode();
 
+  vt::runInEpochCollective([&]{
+    proxy.reduce<vt::collective::PlusOp>(0, std::move(user_event_));
+  });
+
   size_t to_write = traces_.size();
 
   if (traceWritingEnabled(node) and to_write > 0) {
diff --git a/src/vt/trace/trace_user_event.cc b/src/vt/trace/trace_user_event.cc
index e707c1c840..3232ea0228 100644
--- a/src/vt/trace/trace_user_event.cc
+++ b/src/vt/trace/trace_user_event.cc
@@ -82,25 +82,12 @@ UserEventIDType UserEventRegistry::hash(std::string const& in_event_name) {
   id_hash = id_hash & 0x0FFF;
   auto ret = newEventImpl(false, false, in_event_name, id_hash, true);
   auto id = std::get<0>(ret);
-  auto inserted = std::get<1>(ret);
-  if (inserted) {
-    auto const node  = theContext()->getNode();
-    if (node != 0) {
-      auto msg = makeMessage<NewUserEventMsg>(false, id, in_event_name);
-      theMsg()->sendMsg<newEventHan>(0, msg);
-    }
-  }
   return id;
 }
 
 UserEventIDType UserEventRegistry::rooted(std::string const& in_event_name) {
   auto ret = newEventImpl(false, true, in_event_name, cur_root_event_++);
   auto id = std::get<0>(ret);
-  auto const node  = theContext()->getNode();
-  if (node != 0) {
-    auto msg = makeMessage<NewUserEventMsg>(false, id, in_event_name);
-    theMsg()->sendMsg<newEventHan>(0, msg);
-  }
   return id;
 }
 
@@ -109,11 +96,6 @@ UserEventIDType UserEventRegistry::user(
 ) {
   auto ret = newEventImpl(true, false, in_event_name, seq);
   auto id = std::get<0>(ret);
-  auto const node  = theContext()->getNode();
-  if (node != 0) {
-    auto msg = makeMessage<NewUserEventMsg>(true, id, in_event_name);
-    theMsg()->sendMsg<newEventHan>(0, msg);
-  }
   return id;
 }
 #endif
@@ -145,9 +127,18 @@ bool UserEventRegistry::insertEvent(
     );
     return true;
   } else {
+    user_event_[event] += " COLLISION " + name;
     return false;
   }
 }
 
+UserEventRegistry operator+(
+  UserEventRegistry r1, UserEventRegistry const& r2
+) {
+  for (auto& [hash, event_str] : r2.getEvents()) {
+    r1.insertEvent(hash, event_str);
+  }
+  return r1;
+}
 
 }} /* end namespace vt::trace */