diff --git a/packages/twenty-front/src/modules/workflow/workflow-diagram/components/WorkflowDiagramCanvasEditableEffect.tsx b/packages/twenty-front/src/modules/workflow/workflow-diagram/components/WorkflowDiagramCanvasEditableEffect.tsx
index 520b63e08..51fc67c47 100644
--- a/packages/twenty-front/src/modules/workflow/workflow-diagram/components/WorkflowDiagramCanvasEditableEffect.tsx
+++ b/packages/twenty-front/src/modules/workflow/workflow-diagram/components/WorkflowDiagramCanvasEditableEffect.tsx
@@ -41,12 +41,16 @@ export const WorkflowDiagramCanvasEditableEffect = () => {
 
   const handleSelectionChange = useCallback(
     ({ nodes }: OnSelectionChangeParams) => {
-      const selectedNode = nodes[0] as WorkflowDiagramNode;
+      const selectedNode = nodes[0] as WorkflowDiagramNode | undefined;
 
       if (!isInRightDrawer) {
         setCommandMenuNavigationStack([]);
       }
 
+      if (!isDefined(selectedNode)) {
+        return;
+      }
+
       const isEmptyTriggerNode = selectedNode.type === EMPTY_TRIGGER_STEP_ID;
       if (isEmptyTriggerNode) {
         if (isDefined(workflowId)) {
diff --git a/packages/twenty-front/src/modules/workflow/workflow-diagram/components/WorkflowDiagramCanvasReadonlyEffect.tsx b/packages/twenty-front/src/modules/workflow/workflow-diagram/components/WorkflowDiagramCanvasReadonlyEffect.tsx
index 1bb9ef28c..f29a8c9be 100644
--- a/packages/twenty-front/src/modules/workflow/workflow-diagram/components/WorkflowDiagramCanvasReadonlyEffect.tsx
+++ b/packages/twenty-front/src/modules/workflow/workflow-diagram/components/WorkflowDiagramCanvasReadonlyEffect.tsx
@@ -22,7 +22,11 @@ export const WorkflowDiagramCanvasReadonlyEffect = () => {
 
   const handleSelectionChange = useCallback(
     ({ nodes }: OnSelectionChangeParams) => {
-      const selectedNode = nodes[0] as WorkflowDiagramNode;
+      const selectedNode = nodes[0] as WorkflowDiagramNode | undefined;
+
+      if (!isDefined(selectedNode)) {
+        return;
+      }
 
       setWorkflowSelectedNode(selectedNode.id);
 
diff --git a/packages/twenty-front/src/modules/workflow/workflow-diagram/components/WorkflowRunDiagramCanvasEffect.tsx b/packages/twenty-front/src/modules/workflow/workflow-diagram/components/WorkflowRunDiagramCanvasEffect.tsx
index dc0b45b8f..a26e5c053 100644
--- a/packages/twenty-front/src/modules/workflow/workflow-diagram/components/WorkflowRunDiagramCanvasEffect.tsx
+++ b/packages/twenty-front/src/modules/workflow/workflow-diagram/components/WorkflowRunDiagramCanvasEffect.tsx
@@ -49,7 +49,11 @@ export const WorkflowRunDiagramCanvasEffect = () => {
 
   const handleSelectionChange = useCallback(
     ({ nodes }: OnSelectionChangeParams) => {
-      const selectedNode = nodes[0] as WorkflowDiagramNode;
+      const selectedNode = nodes[0] as WorkflowDiagramNode | undefined;
+
+      if (!isDefined(selectedNode)) {
+        return;
+      }
 
       setWorkflowSelectedNode(selectedNode.id);