From ba9fadc8f19d9ce32e1e7469f5dd154875fe2a04 Mon Sep 17 00:00:00 2001
From: ManyTheFish <many@meilisearch.com>
Date: Wed, 5 Jun 2024 10:51:16 +0200
Subject: [PATCH] Put only_additional_fields to None if the difference gives an
 empty result.

---
 milli/src/update/settings.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/milli/src/update/settings.rs b/milli/src/update/settings.rs
index 11a249068..952b017c6 100644
--- a/milli/src/update/settings.rs
+++ b/milli/src/update/settings.rs
@@ -1127,7 +1127,7 @@ impl InnerIndexSettingsDiff {
                 let new: HashSet<_> = new.iter().cloned().collect();
                 if old.difference(&new).next().is_none() {
                     // if no field has been removed return only the additional ones
-                    Some(&new - &old)
+                    Some(&new - &old).filter(|x| !x.is_empty())
                 } else {
                     None
                 }