diff --git a/mapfixes.proto b/mapfixes.proto
index bbdccf8..ccd3072 100644
--- a/mapfixes.proto
+++ b/mapfixes.proto
@@ -50,9 +50,9 @@ message MapfixResponse {
   uint64 Submitter = 7;
   uint64 AssetID = 8;
   uint64 AssetVersion = 9;
-  uint64 ValidatedAssetID = 10;
-  uint64 ValidatedAssetVersion = 11;
-  uint64 UploadedAssetID = 12;
+  optional uint64 ValidatedAssetID = 10;
+  optional uint64 ValidatedAssetVersion = 11;
+  uint64 TargetAssetID = 12;
   MapfixStatus StatusID = 13;
 }
 
diff --git a/submissions.proto b/submissions.proto
index ab47486..d0da309 100644
--- a/submissions.proto
+++ b/submissions.proto
@@ -49,9 +49,9 @@ message SubmissionResponse {
   uint64 Submitter = 9;
   uint64 AssetID = 10;
   uint64 AssetVersion = 11;
-  uint64 ValidatedAssetID = 12;
-  uint64 ValidatedAssetVersion = 13;
-  uint64 UploadedAssetID = 14;
+  optional uint64 ValidatedAssetID = 12;
+  optional uint64 ValidatedAssetVersion = 13;
+  optional uint64 UploadedAssetID = 14;
   SubmissionStatus StatusID = 15;
 }