diff --git a/server/src/main/java/org/elasticsearch/index/IndexVersions.java b/server/src/main/java/org/elasticsearch/index/IndexVersions.java
index 5589508507aec..9116bd5bf0d6c 100644
--- a/server/src/main/java/org/elasticsearch/index/IndexVersions.java
+++ b/server/src/main/java/org/elasticsearch/index/IndexVersions.java
@@ -133,6 +133,7 @@ private static Version parseUnchecked(String version) {
     public static final IndexVersion TIME_BASED_K_ORDERED_DOC_ID_BACKPORT = def(8_520_00_0, Version.LUCENE_9_12_0);
     public static final IndexVersion V8_DEPRECATE_SOURCE_MODE_MAPPER = def(8_521_00_0, Version.LUCENE_9_12_0);
     public static final IndexVersion USE_SYNTHETIC_SOURCE_FOR_RECOVERY_BACKPORT = def(8_522_00_0, Version.LUCENE_9_12_0);
+    public static final IndexVersion UPGRADE_TO_LUCENE_9_12_1 = def(8_523_00_0, parseUnchecked("9.12.1"));
     public static final IndexVersion UPGRADE_TO_LUCENE_10_0_0 = def(9_000_00_0, Version.LUCENE_10_0_0);
     public static final IndexVersion LOGSDB_DEFAULT_IGNORE_DYNAMIC_BEYOND_LIMIT = def(9_001_00_0, Version.LUCENE_10_0_0);
     public static final IndexVersion TIME_BASED_K_ORDERED_DOC_ID = def(9_002_00_0, Version.LUCENE_10_0_0);