Several possible causes, the delete series api returns immediately when there are no long term blocks in cortex, which makes me think that api might be checking if there are any long term blocks before deleting.
More investigation is needed
Steps to reproduce
Install monitoring backend
Install metrics capability in any connected agent
Uninstall metrics with data deletion , with no long term storage blocks
Several possible causes, the delete series api returns immediately when there are no long term blocks in cortex, which makes me think that api might be checking if there are any long term blocks before deleting.
More investigation is needed
Steps to reproduce