add waiting queue

models.py

@@ -58,9 +58,9 @@ class ControlNetPipeline:
 
         # it's your turn, so remove the number from the queue
         # and call the function
-        self.waiting_queue.pop(0)
         print("It's the turn of", self.count)
         return self.pipe(**kwargs)
+        self.waiting_queue.pop(0)
 
 
 @contextmanager