It seems like there is no specific information provided about the Pull Request you are referring to for the project thanos-io/thanos. To create a meaningful summary, I would need details such as the title, description, proposed changes, motivations behind the modifications, and any relevant facts about the instance where the PR is applied (e.g., issues it addresses, features added, or bugs fixed).

Please provide the relevant information or context about the Pull Request, and I’ll be happy to help you summarize it for an advanced developer.