diff --git a/Assets/VRM10/Runtime/IO/Vrm10Data.cs b/Assets/VRM10/Runtime/IO/Vrm10Data.cs
index d9d8b7853..fa5c493b3 100644
--- a/Assets/VRM10/Runtime/IO/Vrm10Data.cs
+++ b/Assets/VRM10/Runtime/IO/Vrm10Data.cs
@@ -76,8 +76,16 @@ namespace UniVRM10
                     return null;
                 }
             }
+            catch (MigrationException ex)
+            {
+                // migration 失敗
+                vrm1Data = default;
+                migration = new MigrationData(ex.Message, oldMeta);
+                return null;
+            }
             catch (Exception ex)
             {
+                // その他のエラー
                 vrm1Data = default;
                 migration = new MigrationData(ex.Message, oldMeta);
                 return null;
diff --git a/Assets/VRM10/Runtime/Migration/MigrationVrmMeta.cs b/Assets/VRM10/Runtime/Migration/MigrationVrmMeta.cs
index 3b87c2b9b..bab234c7d 100644
--- a/Assets/VRM10/Runtime/Migration/MigrationVrmMeta.cs
+++ b/Assets/VRM10/Runtime/Migration/MigrationVrmMeta.cs
@@ -171,8 +171,9 @@ namespace UniVRM10
                 }
                 else
                 {
-                    // different otherLicenseUrl & otherPermissionUrl
-                    throw new MigrationException("otherPermissionUrl", "can not migrate");
+                    // https://github.com/vrm-c/UniVRM/issues/1611
+                    // 両方を記述しエラーとしない
+                    meta.OtherLicenseUrl = $"'{otherLicenseUrl}', '{otherPermissionUrl}'";
                 }
             }
             else if (!string.IsNullOrEmpty(otherLicenseUrl))