Mute org.elasticsearch.index.mapper.LongFieldMapperTests testSyntheticSourceMany #133394

muted-tests.yml

@@ -615,6 +615,9 @@ tests:
 - class: org.elasticsearch.xpack.search.CrossClusterAsyncSearchIT
   method: testCCSClusterDetailsWhereAllShardsSkippedInCanMatch
   issue: https://github.com/elastic/elasticsearch/issues/133370
+- class: org.elasticsearch.index.mapper.LongFieldMapperTests
+  method: testSyntheticSourceMany
+  issue: https://github.com/elastic/elasticsearch/issues/133394
 
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