From 8e4047345371322dcaef4ce84ad76a32b4797031 Mon Sep 17 00:00:00 2001
From: Dickson <dickson.tan.2013@gmail.com>
Date: Sat, 26 Feb 2022 21:15:28 +0800
Subject: [PATCH] fix: dont deduplicate matches if musicbrainz ID is not set
 for album candidates

---
 beets/autotag/match.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/beets/autotag/match.py b/beets/autotag/match.py
index d352a013f..3061aa39b 100644
--- a/beets/autotag/match.py
+++ b/beets/autotag/match.py
@@ -357,8 +357,8 @@ def _add_candidate(items, results, info):
         log.debug('No tracks.')
         return
 
-    # Don't duplicate.
-    if info.album_id in results:
+    # Prevent duplicates
+    if info.album_id and info.album_id in results:
         log.debug('Duplicate.')
         return