diff --git a/fbpcs/common/service/graphapi_trace_logging_service.py b/fbpcs/common/service/graphapi_trace_logging_service.py
index 116c37dbc..0bf84b20f 100644
--- a/fbpcs/common/service/graphapi_trace_logging_service.py
+++ b/fbpcs/common/service/graphapi_trace_logging_service.py
@@ -83,6 +83,7 @@ def _flush_msg_queue(self, msg_queue, flush_size: int = FLUSH_CHUNK_SIZE) -> Non
             aggregate_msg = {}
             for msg in group_mgs_list:
                 if not aggregate_msg:
+                    # pyre-fixme[16]: `SupportsGetItem` has no attribute `copy`.
                     aggregate_msg = msg.copy()
                     continue