add limit

app.py

@@ -245,12 +245,16 @@ with gr.Blocks(css=css) as demo:
         generate_vanilla,
         inputs=[prompt, num_inference_steps, guidance_scale],
         outputs=[video_output],
+        concurrency_id="gen",
+        concurrency_limit=1,
     )
 
     generate_button_vs.click(
         generate_vs,
         inputs=[prompt, num_inference_steps, guidance_scale, pab_threshold_start, pab_threshold_end, pab_range],
         outputs=[video_output_vs],
+        concurrency_id="gen",
+        concurrency_limit=1,
     )
 
     refresh_button.click(update_server_status, outputs=[cpu_status, memory_status, disk_status, gpu_status])