diff --git a/SabreTools.Data.Extensions.Test/MetadataExtensionsTests.cs b/SabreTools.Data.Extensions.Test/MetadataExtensionsTests.cs
index 149f2e11..f994865f 100644
--- a/SabreTools.Data.Extensions.Test/MetadataExtensionsTests.cs
+++ b/SabreTools.Data.Extensions.Test/MetadataExtensionsTests.cs
@@ -2728,6 +2728,7 @@ namespace SabreTools.Data.Extensions.Test
         [InlineData("nodump", ItemStatus.Nodump)]
         [InlineData("yes", ItemStatus.Nodump)]
         [InlineData("verified", ItemStatus.Verified)]
+        [InlineData("deduped", ItemStatus.Deduped)]
         public void AsItemStatusTest(string? field, ItemStatus? expected)
         {
             ItemStatus? actual = field.AsItemStatus();
@@ -3129,6 +3130,8 @@ namespace SabreTools.Data.Extensions.Test
         [InlineData(ItemStatus.Nodump, false, "nodump")]
         [InlineData(ItemStatus.Verified, true, "verified")]
         [InlineData(ItemStatus.Verified, false, "verified")]
+        [InlineData(ItemStatus.Deduped, true, "deduped")]
+        [InlineData(ItemStatus.Deduped, false, "deduped")]
         public void FromItemStatusTest(ItemStatus field, bool useSecond, string? expected)
         {
             string? actual = field.AsStringValue(useSecond);
diff --git a/SabreTools.Data.Extensions/MetadataExtensions.cs b/SabreTools.Data.Extensions/MetadataExtensions.cs
index 80b2547c..9852c363 100644
--- a/SabreTools.Data.Extensions/MetadataExtensions.cs
+++ b/SabreTools.Data.Extensions/MetadataExtensions.cs
@@ -883,6 +883,7 @@ namespace SabreTools.Data.Extensions
                 "baddump" => ItemStatus.BadDump,
                 "nodump" or "yes" => ItemStatus.Nodump,
                 "verified" => ItemStatus.Verified,
+                "deduped" => ItemStatus.Deduped,
                 _ => null,
             };
         }
@@ -1366,6 +1367,7 @@ namespace SabreTools.Data.Extensions
                 ItemStatus.BadDump => "baddump",
                 ItemStatus.Nodump => useSecond ? "yes" : "nodump",
                 ItemStatus.Verified => "verified",
+                ItemStatus.Deduped => "deduped",
                 _ => null,
             };
         }
diff --git a/SabreTools.Data.Models/Metadata/Enums.cs b/SabreTools.Data.Models/Metadata/Enums.cs
index bf01b1cf..d29315e0 100644
--- a/SabreTools.Data.Models/Metadata/Enums.cs
+++ b/SabreTools.Data.Models/Metadata/Enums.cs
@@ -256,6 +256,9 @@ namespace SabreTools.Data.Models.Metadata
 
         /// <summary>"verified"</summary>
         Verified,
+
+        /// <summary>"deduped", RomVault extensions</summary>
+        Deduped,
     }
 
     /// <summary>
diff --git a/SabreTools.Metadata.DatFiles/DatStatistics.cs b/SabreTools.Metadata.DatFiles/DatStatistics.cs
index b2e5c857..e07673c4 100644
--- a/SabreTools.Metadata.DatFiles/DatStatistics.cs
+++ b/SabreTools.Metadata.DatFiles/DatStatistics.cs
@@ -302,6 +302,7 @@ namespace SabreTools.Metadata.DatFiles
             ModifyStatusCount(ItemStatus.Good, status == ItemStatus.Good ? 1 : 0);
             ModifyStatusCount(ItemStatus.Nodump, status == ItemStatus.Nodump ? 1 : 0);
             ModifyStatusCount(ItemStatus.Verified, status == ItemStatus.Verified ? 1 : 0);
+            ModifyStatusCount(ItemStatus.Deduped, status == ItemStatus.Deduped ? 1 : 0);
         }
 
         /// <summary>
@@ -358,6 +359,7 @@ namespace SabreTools.Metadata.DatFiles
             ModifyStatusCount(ItemStatus.Good, status == ItemStatus.Good ? 1 : 0);
             ModifyStatusCount(ItemStatus.Nodump, status == ItemStatus.Nodump ? 1 : 0);
             ModifyStatusCount(ItemStatus.Verified, status == ItemStatus.Verified ? 1 : 0);
+            ModifyStatusCount(ItemStatus.Deduped, status == ItemStatus.Deduped ? 1 : 0);
         }
 
         /// <summary>
@@ -377,6 +379,7 @@ namespace SabreTools.Metadata.DatFiles
             ModifyStatusCount(ItemStatus.Good, status == ItemStatus.Good ? -1 : 0);
             ModifyStatusCount(ItemStatus.Nodump, status == ItemStatus.Nodump ? -1 : 0);
             ModifyStatusCount(ItemStatus.Verified, status == ItemStatus.Verified ? -1 : 0);
+            ModifyStatusCount(ItemStatus.Deduped, status == ItemStatus.Deduped ? -1 : 0);
         }
 
         /// <summary>
@@ -433,6 +436,7 @@ namespace SabreTools.Metadata.DatFiles
             ModifyStatusCount(ItemStatus.Good, status == ItemStatus.Good ? -1 : 0);
             ModifyStatusCount(ItemStatus.Nodump, status == ItemStatus.Nodump ? -1 : 0);
             ModifyStatusCount(ItemStatus.Verified, status == ItemStatus.Verified ? -1 : 0);
+            ModifyStatusCount(ItemStatus.Deduped, status == ItemStatus.Deduped ? -1 : 0);
         }
 
         /// <summary>