As Alibaba Cloud services evolve, some metrics are replaced with newer alternatives or are not recommended. Alert rules that reference these metrics must be updated to maintain monitoring quality.
You can clean up affected alert rules by using the following methods:
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Selectively delete invalid alert rules
Review each invalid alert rule and manually delete it. For more information, see Delete one or more alert rules.
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Batch delete invalid alert rules
Automatically delete all alert rules that reference metrics that are not recommended.