Specific Rule Handling

Hello, I am trying to handle specific rules while using ARM_ARM_TTK linter but unable to disable the rule or change it from error to warning. I have updated the config file as below

linters:
  ARM_ARM_TTK:
    rules:
      - id: 'Variables-Must-Be-Referenced'
        level: 'warning'

Can you please help with the right kind of syntax? Also how do we find the correct rule ids.