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Since you are running in docker, they will be in sqlite file localted in

deploy/docker/clickhouse-setup/data/signoz/signoz.db

. You can use sqlite tool to remove the alrets.

ty, worked like a charm! On a side note, there may be an unhandled edge case with v0.19 upgrade scripts for some alert rules, not sure if anyone else ran into this issue

You are the first one to run into this issue. Many users had successfully migrated.