[Bugfix] Fix KeyError: 1 When Using LoRA adapters (vllm-project#5164)

Author: BlackBird-Coding

vllm/core/scheduler.py

@@ -423,7 +423,9 @@ def _schedule_running(
                 num_running_seqs = seq_group.get_max_num_running_seqs()
                 budget.subtract_num_seqs(seq_group.request_id,
                                          num_running_seqs)
-                if curr_loras is not None and seq_group.lora_int_id > 0:
+
+                if (curr_loras is not None and seq_group.lora_int_id > 0
+                        and seq_group.lora_int_id in curr_loras):
                     curr_loras.remove(seq_group.lora_int_id)
 
                 if running_queue: