From 8d0a26e284490c1b9e8d7d875ef9002d9eee9ff4 Mon Sep 17 00:00:00 2001
From: Qstick <qstick@gmail.com>
Date: Tue, 9 Nov 2021 18:06:43 -0600
Subject: [PATCH] Fix Migration NullRef in MigratePrimaries

Fixes #6716
---
 .../Datastore/Migration/199_mediainfo_to_ffmpeg.cs              | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/NzbDrone.Core/Datastore/Migration/199_mediainfo_to_ffmpeg.cs b/src/NzbDrone.Core/Datastore/Migration/199_mediainfo_to_ffmpeg.cs
index 48a108c4d..1924e0de7 100644
--- a/src/NzbDrone.Core/Datastore/Migration/199_mediainfo_to_ffmpeg.cs
+++ b/src/NzbDrone.Core/Datastore/Migration/199_mediainfo_to_ffmpeg.cs
@@ -789,7 +789,7 @@ namespace NzbDrone.Core.Datastore.Migration
 
         private string MigratePrimaries(string primary)
         {
-            return primary.Replace("BT.", "bt");
+            return primary.IsNotNullOrWhiteSpace() ? primary.Replace("BT.", "bt") : primary;
         }
 
         private string MigrateTransferCharacteristics(string transferCharacteristics)