diff --git a/DataImport.cs b/DataImport.cs
index 327fa80..ed13ee8 100644
--- a/DataImport.cs
+++ b/DataImport.cs
@@ -178,7 +178,7 @@ public class DataImport
                 return fieldValues.TryGetValue(name, out var v) ? v : "";
             }
 
-            var new_refsid = 0;
+            var new_refsid = last_refsid;
             if (!refsid_existing)
                 new_refsid = GenerateNewRefsid();
             else