From 400bc5f8bbefa6d04447bb19acd65ef5fda0c5fe Mon Sep 17 00:00:00 2001
From: ta264 <ta264@users.noreply.github.com>
Date: Mon, 18 Jan 2021 21:06:49 +0000
Subject: [PATCH] Fixed: Abort if calibre detects duplicate

---
 src/NzbDrone.Core/Books/Calibre/CalibreProxy.cs | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/NzbDrone.Core/Books/Calibre/CalibreProxy.cs b/src/NzbDrone.Core/Books/Calibre/CalibreProxy.cs
index 25c85c4ed..435b1c176 100644
--- a/src/NzbDrone.Core/Books/Calibre/CalibreProxy.cs
+++ b/src/NzbDrone.Core/Books/Calibre/CalibreProxy.cs
@@ -72,7 +72,14 @@ namespace NzbDrone.Core.Books.Calibre
                 var request = builder.Build();
                 request.SetContent(body);
 
-                return _httpClient.Post<CalibreImportJob>(request).Resource;
+                var response = _httpClient.Post<CalibreImportJob>(request).Resource;
+
+                if (response.Id == 0)
+                {
+                    throw new CalibreException("Calibre rejected duplicate book");
+                }
+
+                return response;
             }
             catch (HttpException ex)
             {