diff --git a/vllm/model_executor/models/bailing_moe_v3.py b/vllm/model_executor/models/bailing_moe_v3.py
index 6ddb277778..0c15f073a1 100644
--- a/vllm/model_executor/models/bailing_moe_v3.py
+++ b/vllm/model_executor/models/bailing_moe_v3.py
@@ -813,7 +813,10 @@ class BailingMoeV3KimiDeltaAttention(PluggableLayer, MambaBase):
             return
 
         assert isinstance(attn_metadata_map, dict)
-        attn_metadata = attn_metadata_map[self.prefix]
+        attn_metadata = attn_metadata_map.get(self.prefix)
+        if attn_metadata is None:
+            # Profile/warmup dummy runs skip mamba-family metadata.
+            return
         assert isinstance(attn_metadata, GDNAttentionMetadata)
         has_initial_state = attn_metadata.has_initial_state
         spec_query_start_loc = attn_metadata.spec_query_start_loc