From 290463fe7b464ad5218a1b5646891be453bcc458 Mon Sep 17 00:00:00 2001
From: David Federman <dfederm@microsoft.com>
Date: Wed, 11 Feb 2026 23:35:59 -0800
Subject: [PATCH] Fix migration UNIQUE constraint on BaseItemProviders

Deduplicate ProviderIds by ProviderId during MigrateLibraryDb migration
to prevent UNIQUE constraint violations when legacy data contains
duplicate provider entries for the same item.

Fixes #16134
---
 Jellyfin.Server/Migrations/Routines/MigrateLibraryDb.cs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Jellyfin.Server/Migrations/Routines/MigrateLibraryDb.cs b/Jellyfin.Server/Migrations/Routines/MigrateLibraryDb.cs
index d221d18531..59b7e143c1 100644
--- a/Jellyfin.Server/Migrations/Routines/MigrateLibraryDb.cs
+++ b/Jellyfin.Server/Migrations/Routines/MigrateLibraryDb.cs
@@ -1163,7 +1163,9 @@ internal class MigrateLibraryDb : IDatabaseMigrationRoutine
                 Item = null!,
                 ProviderId = e[0],
                 ProviderValue = string.Join('|', e.Skip(1))
-            }).ToArray();
+            })
+            .DistinctBy(e => e.ProviderId)
+            .ToArray();
         }
 
         if (reader.TryGetString(index++, out var imageInfos))