From c495753315f6f1937d2c7942a9d06775ddb56429 Mon Sep 17 00:00:00 2001
From: Leodyver Semilla <124951048+leodyversemilla07@users.noreply.github.com>
Date: Thu, 19 Mar 2026 16:24:58 +0800
Subject: [PATCH] Fix tracker-induced duplicate key crash in duplicate
 detection (#3040)

---
 CHANGELOG.md                                      | 3 +++
 data/src/main/sqldelight/tachiyomi/data/mangas.sq | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index a4850029f..a7cbef97c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,9 @@ The format is a modified version of [Keep a Changelog](https://keepachangelog.co
 ### Improved
 - Rework internals for better performance ([@Lolle2000la](https://github.com/Lolle2000la)) ([#2955](https://github.com/mihonapp/mihon/pull/2955))
 
+### Fixed
+- Fix tracker-induced duplicate key crash in duplicate detection ([@leodyversemilla07](https://github.com/leodyversemilla07)) ([#3040](https://github.com/mihonapp/mihon/pull/3040))
+
 ## [v0.19.4] - 2026-02-25
 ### Added
 - Automatically remove downloads on Suwayomi after reading, configurable via extension settings ([@cpiber](https://github.com/cpiber)) ([#2673](https://github.com/mihonapp/mihon/pull/2673))
diff --git a/data/src/main/sqldelight/tachiyomi/data/mangas.sq b/data/src/main/sqldelight/tachiyomi/data/mangas.sq
index 8125360c0..d98835180 100644
--- a/data/src/main/sqldelight/tachiyomi/data/mangas.sq
+++ b/data/src/main/sqldelight/tachiyomi/data/mangas.sq
@@ -119,7 +119,7 @@ AND source = :sourceId;
 getDuplicateLibraryManga:
 WITH
 track_dupes AS (
-    SELECT S2.manga_id
+    SELECT DISTINCT S2.manga_id
     FROM manga_sync S1
     INNER JOIN manga_sync S2
     ON S1.sync_id = S2.sync_id