[FIX] Solve build issue (TaskManagerContract::awaitShouldAwaitWaitingTask)
diff --git a/event-sourcing/event-sourcing-core/src/main/scala/org/apache/james/eventsourcing/EventBus.scala b/event-sourcing/event-sourcing-core/src/main/scala/org/apache/james/eventsourcing/EventBus.scala
index e932252..f6ebd52 100644
--- a/event-sourcing/event-sourcing-core/src/main/scala/org/apache/james/eventsourcing/EventBus.scala
+++ b/event-sourcing/event-sourcing-core/src/main/scala/org/apache/james/eventsourcing/EventBus.scala
@@ -36,7 +36,7 @@
 
   def runHandlers(events: Iterable[Event], subscribers: Set[Subscriber]): SMono[Void] =
     SFlux.fromIterable(events.flatMap((event: Event) => subscribers.map(subscriber => (event, subscriber))))
-      .flatMapSequential(infos => runHandler(infos._1, infos._2))
+      .concatMap(infos => runHandler(infos._1, infos._2))
       .`then`()
       .`then`(SMono.empty)