tldr;
In terms of operations, Prometheus does not distinguish between timestamp names and labels; By deleting the experiment data, you can effectively restore the labels you created.
What follows is only Prometheus> = 2.0
Prometheus , . , my_metric{my_tag="a"}
, my_metric{my_tag="b"}
your_metric{}
- ; .
, Prometheus 2- . , , , . . !