Failing test: Jest Integration Tests.src/core/server/integration_tests/saved_objects/migrations/group5 - when upgrading to a new stack version if the mappings are compatible and discardUnknownObjects = false fails if unknown documents exist

[kibanamachine]

A test failed on a tracked branch

Error: Unable to read snapshot manifest: Internal Server Error
  <?xml version='1.0' encoding='UTF-8'?><Error><Code>InternalError</Code><Message>We encountered an internal error. Please try again.</Message><Details>AJaNjXZNBcJfb4gZ5KY/yJFCR+hmvSxmr9WchZlKdM/FhHmFiNQEG//qD5cIrG4nxrCIFLQ5BtgNV1ncPCYXOlJQ/kEzvrzVviVAe1su8YnPOwx8CNUHV4tRFMctQxYbbNx/cu1B7Mvi</Details></Error>
    at getArtifactSpecForSnapshot (/opt/buildkite-agent/builds/bk-agent-prod-gcp-1727110296128271182/elastic/kibana-on-merge/kibana/packages/kbn-es/src/artifact.ts:151:11)
    at processTicksAndRejections (node:internal/process/task_queues:95:5)
    at Function.getSnapshot (/opt/buildkite-agent/builds/bk-agent-prod-gcp-1727110296128271182/elastic/kibana-on-merge/kibana/packages/kbn-es/src/artifact.ts:194:26)
    at downloadSnapshot (/opt/buildkite-agent/builds/bk-agent-prod-gcp-1727110296128271182/elastic/kibana-on-merge/kibana/packages/kbn-es/src/install/install_snapshot.ts:34:20)
    at installSnapshot (/opt/buildkite-agent/builds/bk-agent-prod-gcp-1727110296128271182/elastic/kibana-on-merge/kibana/packages/kbn-es/src/install/install_snapshot.ts:57:28)
    at /opt/buildkite-agent/builds/bk-agent-prod-gcp-1727110296128271182/elastic/kibana-on-merge/kibana/packages/kbn-es/src/cluster.ts:121:48
    at /opt/buildkite-agent/builds/bk-agent-prod-gcp-1727110296128271182/elastic/kibana-on-merge/kibana/packages/kbn-tooling-log/src/tooling_log.ts:94:18
    at Cluster.installSnapshot (/opt/buildkite-agent/builds/bk-agent-prod-gcp-1727110296128271182/elastic/kibana-on-merge/kibana/packages/kbn-es/src/cluster.ts:120:12)
    at TestCluster.start (/opt/buildkite-agent/builds/bk-agent-prod-gcp-1727110296128271182/elastic/kibana-on-merge/kibana/packages/kbn-test/src/es/test_es_cluster.ts:246:45)
    at startES (/opt/buildkite-agent/builds/bk-agent-prod-gcp-1727110296128271182/elastic/kibana-on-merge/kibana/packages/core/test-helpers/core-test-helpers-kbn-server/src/create_root.ts:269:7)
    at startElasticsearch (/opt/buildkite-agent/builds/bk-agent-prod-gcp-1727110296128271182/elastic/kibana-on-merge/kibana/src/core/server/integration_tests/saved_objects/migrations/kibana_migrator_test_kit.ts:115:10)
    at Object.<anonymous> (/opt/buildkite-agent/builds/bk-agent-prod-gcp-1727110296128271182/elastic/kibana-on-merge/kibana/src/core/server/integration_tests/saved_objects/migrations/group5/active_delete.test.ts:35:16)

First failure: kibana-on-merge - main

[elasticmachine]

Pinging @elastic/kibana-core (Team:Core)