diff --git a/vllm/attention/backends/torch_sdpa.py b/vllm/attention/backends/torch_sdpa.py
index 3e1336a5ac3b..af5fe81dc883 100644
--- a/vllm/attention/backends/torch_sdpa.py
+++ b/vllm/attention/backends/torch_sdpa.py
@@ -65,7 +65,7 @@ def swap_blocks(
         dst_kv_cache: torch.Tensor,
         src_to_dst: torch.Tensor,
     ) -> None:
-        PagedAttention.swap_blocks(src_kv_cache, dst_kv_cache, src_to_dst)
+        raise NotImplementedError("Swap is not supported in TorchSDPABackend.")
 
     @staticmethod
     def copy_blocks(