diff --git a/src/pages/tenant/CreateDocument.tsx b/src/pages/tenant/CreateDocument.tsx
index 24b5f97..7775de5 100644
--- a/src/pages/tenant/CreateDocument.tsx
+++ b/src/pages/tenant/CreateDocument.tsx
@@ -339,7 +339,7 @@ const CreateDocument = (): ReactElement => {
           .module_id,
         source_module_id: data.selectedModuleId,
         source_record_id: data.source_record_id?.trim() || undefined,
-        workflow_definition_id: data.workflow_definition_id,
+        workflow_definition_id: data.workflow_definition_id || undefined,
         sections: data.sections?.map((s, i) => ({
           title: s.title,
           content: s.content,