trigger_next_transition method will call the create trigger of the next stage for machines in CREATED state

atst/models/portfolio_state_machine.py

@@ -108,13 +108,17 @@ class PortfolioStateMachine(
             # the create trigger for the next stage should be in the available
             # triggers for the current state
             triggers = self.machine.get_triggers(state_obj.name)
+            try:
                 create_trigger = list(
                     filter(
                         lambda trigger: trigger.startswith("create_"),
                         self.machine.get_triggers(self.state.name),
                     )
                 )[0]
-            if create_trigger:
+            except IndexError:
+                # are we done ?
+                pass
+            else:
                 self.trigger(create_trigger, **kwargs)
 
     # @with_payload