From 74db90924ef0180a22ea7c8d79cd3b96599223f9 Mon Sep 17 00:00:00 2001
From: Jojo-1000 <33495614+Jojo-1000@users.noreply.github.com>
Date: Sat, 24 Jun 2023 21:49:32 +0200
Subject: [PATCH] Fix processing files repeatedly if present in multiple
 sources.

This can happen if a source is added to force including a system folder.
---
 .../Library/Main/Operation/Backup/FileEnumerationProcess.cs     | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Duplicati/Library/Main/Operation/Backup/FileEnumerationProcess.cs b/Duplicati/Library/Main/Operation/Backup/FileEnumerationProcess.cs
index e816fbbab..993776d25 100644
--- a/Duplicati/Library/Main/Operation/Backup/FileEnumerationProcess.cs
+++ b/Duplicati/Library/Main/Operation/Backup/FileEnumerationProcess.cs
@@ -105,7 +105,7 @@ namespace Duplicati.Library.Main.Operation.Backup
                         worklist = snapshot.EnumerateFilesAndFolders(sources, attributeFilter, (rootpath, errorpath, ex) =>
                         {
                             Logging.Log.WriteWarningMessage(FILTER_LOGTAG, "FileAccessError", ex, "Error reported while accessing file: {0}", errorpath);
-                        });
+                        }).Distinct(Library.Utility.Utility.IsFSCaseSensitive ? StringComparer.Ordinal : StringComparer.OrdinalIgnoreCase);
                     }
 
                     if (token.IsCancellationRequested)