diff --git a/src/NzbDrone.Core/MediaFiles/BookImport/ImportApprovedBooks.cs b/src/NzbDrone.Core/MediaFiles/BookImport/ImportApprovedBooks.cs
index 5b06fd726..145be9021 100644
--- a/src/NzbDrone.Core/MediaFiles/BookImport/ImportApprovedBooks.cs
+++ b/src/NzbDrone.Core/MediaFiles/BookImport/ImportApprovedBooks.cs
@@ -110,10 +110,10 @@ namespace NzbDrone.Core.MediaFiles.BookImport
                     continue;
                 }
 
-                if (replaceExisting)
-                {
-                    RemoveExistingTrackFiles(author, book);
-                }
+                // if (replaceExisting)
+                // {
+                //     RemoveExistingTrackFiles(author, book);
+                // }
 
                 // set the correct release to be monitored before importing the new files
                 var newRelease = albumDecision.First().Item.Edition;
diff --git a/src/NzbDrone.Core/MediaFiles/UpgradeMediaFileService.cs b/src/NzbDrone.Core/MediaFiles/UpgradeMediaFileService.cs
index b1cb9706c..0ff4baf8e 100644
--- a/src/NzbDrone.Core/MediaFiles/UpgradeMediaFileService.cs
+++ b/src/NzbDrone.Core/MediaFiles/UpgradeMediaFileService.cs
@@ -75,7 +75,7 @@ namespace NzbDrone.Core.MediaFiles
 
                 if (_diskProvider.FileExists(bookFilePath))
                 {
-                    _logger.Debug("Removing existing book file: {0}", file);
+                    _logger.Debug("Removing existing book file: {0} CalibreId: {1}", file, file.CalibreId);
 
                     if (!isCalibre)
                     {
@@ -83,12 +83,10 @@ namespace NzbDrone.Core.MediaFiles
                     }
                     else
                     {
-                        _calibre.RemoveFormats(file.CalibreId,
-                                              new[]
-                                              {
-                                                  Path.GetExtension(bookFile.Path)
-                                              },
-                                              settings);
+                        var existing = _calibre.GetBook(file.CalibreId, settings);
+                        var existingFormats = existing.Formats.Keys;
+                        _logger.Debug($"Removing existing formats {existingFormats.ConcatToString()} from calibre");
+                        _calibre.RemoveFormats(file.CalibreId, existingFormats, settings);
                     }
                 }
 
@@ -126,7 +124,7 @@ namespace NzbDrone.Core.MediaFiles
 
         public BookFile CalibreAddAndConvert(BookFile file, CalibreSettings settings)
         {
-            _logger.Trace($"Importing to calibre: {file.Path}");
+            _logger.Trace($"Importing to calibre: {file.Path} calibre id: {file.CalibreId}");
 
             if (file.CalibreId == 0)
             {