ID: 14374 Title: Prometheus special agent configuration: Crash when updating from Checkmk 2.0 to 2.1 Component: Setup Level: 1 Class: Bug fix Version: 2.2.0i1 When updating from Checkmk 2.0 to 2.1, there was a crash related to the configuration of the Prometheus special agent: C+: 2022-06-24 12:59:27 - Updating site '...' from version 2.0.0p26.cee to 2.1.0p3.cee... ... -| 6/25 Rewriting rulesets... ... -| ERROR: Failed to transform rule: (Ruleset: special_agents:prometheus, ...) -| + "Rewriting rulesets" failed -| Traceback (most recent call last): ... -| AssertionError C-: After the update, the user interface displayed the following error message when attempting to edit the affected Prometheus rules: "Unable to read current options of this rule. Falling back to default values. When saving this rule now, your previous settings will be overwritten. Problem was: Prometheus connection option: Value must be a tuple with two elements"