Spring Boot 2.1.2 defines Elasticsearch version as 6.4.3 in https://github.com/spring-projects/spring-boot/blob/v2.1.2.RELEASE/spring-boot-project/spring-boot-dependencies/pom.xml.
However, Spring Data Elasticsearch defines version as 6.2.2 in https://github.com/spring-projects/spring-data-elasticsearch/blob/3.1.4.RELEASE/pom.xml
So if we do not force the version, Gradle will use the highest version 6.4.3 for Elasticsearch libraries. Is it required to downgrade Elasticsearch version to 6.2.2 manually as shown in compatible versions chart at https://github.com/spring-projects/spring-data-elasticsearch?