From 69c76deeb8669124077bb119b411c93ae84d890b Mon Sep 17 00:00:00 2001
From: ahiuchingau <20424172+ahiuchingau@users.noreply.github.com>
Date: Wed, 8 Jan 2025 17:24:59 -0500
Subject: [PATCH] too complex

---
 .../state/module_substates/flex_stacker_substate.py           | 2 +-
 api/src/opentrons/protocol_engine/state/modules.py            | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/api/src/opentrons/protocol_engine/state/module_substates/flex_stacker_substate.py b/api/src/opentrons/protocol_engine/state/module_substates/flex_stacker_substate.py
index 8f9efad4df1..5f655823a95 100644
--- a/api/src/opentrons/protocol_engine/state/module_substates/flex_stacker_substate.py
+++ b/api/src/opentrons/protocol_engine/state/module_substates/flex_stacker_substate.py
@@ -15,4 +15,4 @@ class FlexStackerSubState:
     """
 
     module_id: FlexStackerId
-    labware_name: str
+    labware_name: str = ""
diff --git a/api/src/opentrons/protocol_engine/state/modules.py b/api/src/opentrons/protocol_engine/state/modules.py
index 18bccb24a93..4fe757fbb7a 100644
--- a/api/src/opentrons/protocol_engine/state/modules.py
+++ b/api/src/opentrons/protocol_engine/state/modules.py
@@ -373,6 +373,10 @@ def _add_module_substate(
                 configured_wavelengths=None,
                 reference_wavelength=None,
             )
+        elif ModuleModel.is_flex_stacker(actual_model):
+            self._state.substate_by_module_id[module_id] = FlexStackerSubState(
+                module_id=FlexStackerId(module_id),
+            )
 
     def _update_additional_slots_occupied_by_thermocycler(
         self,