fix: dup on update

src/controllers/04-flow-template-controller.ts

@@ -176,6 +176,7 @@ export class FlowTemplateController extends Controller {
         ...body,
         statusOrder: +(body.status === "INACTIVE"),
         step: {
+          deleteMany: {},
           create: body.step.map((v, i) => ({
             type: v.type,
             name: v.name,