diff --git a/python/sglang/srt/disaggregation/common/conn.py b/python/sglang/srt/disaggregation/common/conn.py
index 4b431809b..f59bc181e 100644
--- a/python/sglang/srt/disaggregation/common/conn.py
+++ b/python/sglang/srt/disaggregation/common/conn.py
@@ -1130,8 +1130,8 @@ class CommonKVManager(BaseKVManager):
                 del self.connection_pool[k]
             self.prefill_info_table.pop(failed_bootstrap_addr, None)
 
-            possible_affected_rooms = self.addr_to_rooms_tracker.get(
-                failed_bootstrap_addr, []
+            possible_affected_rooms = list(
+                self.addr_to_rooms_tracker.get(failed_bootstrap_addr, [])
             )
             self.addr_to_rooms_tracker.pop(failed_bootstrap_addr, None)