Fixing test failure #127657

Author: benwtrent

muted-tests.yml

@@ -444,9 +444,6 @@ tests:
 - class: org.elasticsearch.xpack.esql.qa.multi_node.EsqlSpecIT
   method: test {rerank.Reranker using another sort order ASYNC}
   issue: https://github.com/elastic/elasticsearch/issues/127638
-- class: org.elasticsearch.index.mapper.vectors.DenseVectorFieldMapperTests
-  method: testRescoreVectorOldIndexVersion
-  issue: https://github.com/elastic/elasticsearch/issues/127657
 
 # Examples:
 #

server/src/test/java/org/elasticsearch/index/mapper/vectors/DenseVectorFieldMapperTests.java

@@ -904,14 +904,17 @@ public void testRescoreVectorForNonQuantized() {
     }
 
     public void testRescoreVectorOldIndexVersion() {
-        IndexVersion incompatibleVersion = IndexVersionUtils.randomVersionBetween(
-            random(),
+        IndexVersion incompatibleVersion = randomFrom(
             IndexVersionUtils.randomVersionBetween(
                 random(),
                 IndexVersionUtils.getLowestReadCompatibleVersion(),
                 IndexVersionUtils.getPreviousVersion(IndexVersions.ADD_RESCORE_PARAMS_TO_QUANTIZED_VECTORS_BACKPORT_8_X)
             ),
-            IndexVersionUtils.getPreviousVersion(IndexVersions.ADD_RESCORE_PARAMS_TO_QUANTIZED_VECTORS)
+            IndexVersionUtils.randomVersionBetween(
+                random(),
+                IndexVersions.UPGRADE_TO_LUCENE_10_0_0,
+                IndexVersionUtils.getPreviousVersion(IndexVersions.ADD_RESCORE_PARAMS_TO_QUANTIZED_VECTORS)
+            )
         );
         for (String indexType : List.of("int8_hnsw", "int8_flat", "int4_hnsw", "int4_flat", "bbq_hnsw", "bbq_flat")) {
             expectThrows(