diff --git a/SabreTools.Library/Dats/Partials/DatFile.ConvertUpdate.cs b/SabreTools.Library/Dats/Partials/DatFile.ConvertUpdate.cs
index 406507a4..949fe707 100644
--- a/SabreTools.Library/Dats/Partials/DatFile.ConvertUpdate.cs
+++ b/SabreTools.Library/Dats/Partials/DatFile.ConvertUpdate.cs
@@ -211,7 +211,7 @@ namespace SabreTools.Library.Dats
 						Globals.ParallelOptions,
 						datItem =>
 					{
-						if (!datItem.HasDuplicates(this))
+						if (!datItem.HasDuplicates(this, true))
 						{
 							lock (keepDatItems)
 							{