baseCanaryRunId

Specifies which canary run to use the screenshots from as the baseline for future visual monitoring with this canary. Valid values are nextrun to use the screenshots from the next run after this update is made, lastrun to use the screenshots from the most recent run before this update was made, or the value of Id in the CanaryRun from a run of this a canary in the past 31 days. If you specify the Id of a canary run older than 31 days, the operation returns a 400 validation exception error..