From 7fa9253abc1e4056d425847e2eaa5a8e107fc297 Mon Sep 17 00:00:00 2001
From: Emile Bangma <github@emilebangma.com>
Date: Wed, 28 May 2025 23:20:59 +0000
Subject: [PATCH] Node 22 (#1997)

---
 quartz/plugins/transformers/frontmatter.ts |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/quartz/plugins/transformers/frontmatter.ts b/quartz/plugins/transformers/frontmatter.ts
index c04c52a..ce57428 100644
--- a/quartz/plugins/transformers/frontmatter.ts
+++ b/quartz/plugins/transformers/frontmatter.ts
@@ -114,6 +114,10 @@
 
             if (socialImage) data.socialImage = socialImage
 
+            // Remove duplicate slugs
+            const uniqueSlugs = [...new Set(allSlugs)]
+            allSlugs.splice(0, allSlugs.length, ...uniqueSlugs)
+
             // fill in frontmatter
             file.data.frontmatter = data as QuartzPluginData["frontmatter"]
           }

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