diff --git a/upload-processor/BulkFileUploadFunctionApp/Services/UploadProcessingService.cs b/upload-processor/BulkFileUploadFunctionApp/Services/UploadProcessingService.cs
index 5f966f0e6..5433d4ae5 100644
--- a/upload-processor/BulkFileUploadFunctionApp/Services/UploadProcessingService.cs
+++ b/upload-processor/BulkFileUploadFunctionApp/Services/UploadProcessingService.cs
@@ -553,7 +553,7 @@ private void HydrateMetadata(TusInfoFile tusInfoFile, UploadConfig uploadConfig,
             tusInfoFile.MetaData["tus_tguid"] = tusInfoFile.ID; // TODO: verify this field can be replaced with upload_id only.
             tusInfoFile.MetaData["upload_id"] = tusInfoFile.ID;
             tusInfoFile.MetaData["trace_id"] = traceId;
-            tusInfoFile.MetaData["span_id"] = spanId;
+            tusInfoFile.MetaData["parent_span_id"] = spanId;
             tusInfoFile.MetaData.Remove("filename"); // Remove filename field to use standard received_filename field.
         }