[CI] XPackRestIT test {p0=data_stream/140_data_stream_aliases/Create data stream alias with filter} failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic #6975 / graalvm-ce17_checkrestcompat_java-matrix
• elasticsearch-periodic-platform-support #6983 / windows-2022_checkrestcompat_platform-support-windows

Reproduction Line:

./gradlew ":x-pack:plugin:yamlRestTestV7CompatTest" --tests "org.elasticsearch.xpack.test.rest.XPackRestIT.test {p0=data_stream/140_data_stream_aliases/Create data stream alias with filter}" -Dtests.seed=87A3E031DEEA46F3 -Dtests.locale=sw -Dtests.timezone=Mexico/BajaNorte -Druntime.java=17

Applicable branches:
8.18

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: Failure at [data_stream/140_data_stream_aliases:236]: got unexpected warning header [
	299 Elasticsearch-8.18.0-5ce8016e59e4408fd6974663e393bb5827664c04 "this request accesses system indices: [.security-7], but in a future major version, direct access to system indices will be prevented by default"
]

Issue Reasons:

• [8.18] 2 failures in test test {p0=data_stream/140_data_stream_aliases/Create data stream alias with filter} (3.6% fail rate in 55 executions)

Note:
This issue was created using new test triage automation. Please report issues or feedback to es-delivery.

[elasticsearchmachine]

Pinging @elastic/es-search-relevance (Team:Search Relevance)

[elasticsearchmachine]

Pinging @elastic/es-security (Team:Security)