**Build scan:**
https://gradle-enterprise.elastic.co/s/5o5t5vmxnhh54/tests/:x-pack:plugin:core:test/org.elasticsearch.xpack.core.slm.SnapshotRetentionConfigurationTests/testMaximum
**Reproduction line:**
```
./gradlew ':x-pack:plugin:core:test' --tests "org.elasticsearch.xpack.core.slm.SnapshotRetentionConfigurationTests.testMaximum" -Dtests.seed=55ACF6BCA4F8280E -Dtests.locale=pt-PT -Dtests.timezone=Navajo -Druntime.java=17 -Dtests.fips.enabled=true
```

**Applicable branches:**
8.11

**Reproduces locally?:**
Yes

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.xpack.core.slm.SnapshotRetentionConfigurationTests&tests.test=testMaximum


**Failure excerpt:**
```
java.lang.IllegalStateException: Duplicate key snap-lkg/uuid (attempted merging values org.elasticsearch.repositories.RepositoryData$SnapshotDetails@2b9bea90 and org.elasticsearch.repositories.RepositoryData$SnapshotDetails@2b9c19ca)

  at __randomizedtesting.SeedInfo.seed([55ACF6BCA4F8280E:84EC025013DCDD07]:0)
  at java.util.stream.Collectors.duplicateKeyException(Collectors.java:135)
  at java.util.stream.Collectors.lambda$uniqKeysMapAccumulator$1(Collectors.java:182)
  at java.util.stream.ReduceOps$3ReducingSink.accept(ReduceOps.java:169)
  at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:992)
  at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
  at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
  at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)
  at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
  at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682)
  at org.elasticsearch.xpack.core.slm.SnapshotRetentionConfigurationTests.detailsMap(SnapshotRetentionConfigurationTests.java:52)
  at org.elasticsearch.xpack.core.slm.SnapshotRetentionConfigurationTests.testMaximum(SnapshotRetentionConfigurationTests.java:116)
  at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-2)
  at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
  at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:568)
  at com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1758)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:946)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:982)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:996)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.tests.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:48)
  at org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at org.apache.lucene.tests.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:45)
  at org.apache.lucene.tests.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
  at org.apache.lucene.tests.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:44)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:390)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:843)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:490)
  at com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:955)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:840)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:891)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:902)
  at org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.tests.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:38)
  at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
  at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.tests.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
  at org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at org.apache.lucene.tests.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:44)
  at org.apache.lucene.tests.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
  at org.apache.lucene.tests.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:47)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:390)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.lambda$forkTimeoutingTask$0(ThreadLeakControl.java:850)
  at java.lang.Thread.run(Thread.java:833)

```
server/src/main/java/org/elasticsearch/repositories/RepositoryData.java
*/
    public Map<String, IndexId> resolveNewIndices(List<String> indicesToResolve, Map<String, IndexId> inFlightIds) {
        Map<String, IndexId> snapshotIndices = Maps.newMapWithExpectedSize(indicesToResolve.size());
        for (String index : indicesToResolve) {
            IndexId indexId = indices.get(index);
            if (indexId == null) {
                indexId = inFlightIds.get(index);
            }
            if (indexId == null) {
                indexId = new IndexId(index, UUIDs.randomBase64UUID());
            }
            snapshotIndices.put(indexId.getName(), indexId);
        }
        return Map.copyOf(snapshotIndices);
    }
    private static final String SHARD_GENERATIONS = "shard_generations";
    private static final String INDEX_METADATA_IDENTIFIERS = "index_metadata_identifiers";
    private static final String INDEX_METADATA_LOOKUP = "index_metadata_lookup";
    private static final String SNAPSHOTS = "snapshots";
    private static final String INDICES = "indices";
    private static final String INDEX_ID = "id";
    private static final String NAME = "name";
    private static final String UUID = "uuid";
    private static final String CLUSTER_UUID = "cluster_id";
    private static final String STATE = "state";
    private static final String VERSION = "version";
    private static final String INDEX_VERSION = "index_version";
    private static final String MIN_VERSION = "min_version";
    private static final String START_TIME_MILLIS = "start_time_millis";
    private static final String END_TIME_MILLIS = "end_time_millis";