diff --git a/muted-tests.yml b/muted-tests.yml
index ebbabd7142c1e..7d6194cc68ee1 100644
--- a/muted-tests.yml
+++ b/muted-tests.yml
@@ -478,9 +478,6 @@ tests:
 - class: org.elasticsearch.xpack.aggregatemetric.mapper.AggregateMetricDoubleFieldMapperTests
   method: testSortShortcuts
   issue: https://github.com/elastic/elasticsearch/issues/139456
-- class: org.elasticsearch.xpack.logsdb.RandomizedRollingUpgradeIT
-  method: testIndexingSyntheticSource
-  issue: https://github.com/elastic/elasticsearch/issues/139482
 - class: org.elasticsearch.xpack.esql.qa.mixed.FieldExtractorIT
   method: testIntegerDocValuesConflict {STORED}
   issue: https://github.com/elastic/elasticsearch/issues/139487
diff --git a/server/src/main/java/org/elasticsearch/index/IndexVersions.java b/server/src/main/java/org/elasticsearch/index/IndexVersions.java
index cc39430de6a35..ba40432ab8939 100644
--- a/server/src/main/java/org/elasticsearch/index/IndexVersions.java
+++ b/server/src/main/java/org/elasticsearch/index/IndexVersions.java
@@ -180,6 +180,7 @@ private static Version parseUnchecked(String version) {
     public static final IndexVersion SPARSE_VECTOR_PRUNING_INDEX_OPTIONS_SUPPORT = def(9_031_0_00, Version.LUCENE_10_2_2);
     public static final IndexVersion DEFAULT_DENSE_VECTOR_TO_BBQ_HNSW = def(9_032_0_00, Version.LUCENE_10_2_2);
     public static final IndexVersion MATCH_ONLY_TEXT_STORED_AS_BYTES = def(9_033_0_00, Version.LUCENE_10_2_2);
+    public static final IndexVersion BACKPORT_91_SECURITY_MIGRATIONS_METADATA_FLATTENED_UPDATE = def(9_033_0_01, Version.LUCENE_10_2_2);
     public static final IndexVersion IGNORED_SOURCE_COALESCED_ENTRIES_WITH_FF = def(9_034_0_00, Version.LUCENE_10_2_2);
     public static final IndexVersion EXCLUDE_SOURCE_VECTORS_DEFAULT = def(9_035_0_00, Version.LUCENE_10_2_2);
     public static final IndexVersion DISABLE_NORMS_BY_DEFAULT_FOR_LOGSDB_AND_TSDB = def(9_036_0_00, Version.LUCENE_10_2_2);