Fix datetime

shared/messaging/events.py

@@ -21,7 +21,7 @@ class BaseEvent:
         if not self.event_id:
             self.event_id = str(uuid.uuid4())
         if not self.timestamp:
-            self.timestamp = datetime.utcnow()
+            self.timestamp =  datetime.now(datetime.timezone.utc)
 
 # Training Events
 @dataclass