Constant BLOCKED_ON_UNREADABLE_RUN_REASON 

pub const BLOCKED_ON_UNREADABLE_RUN_REASON: &str = "BlockedOnUnreadableRun";

reason/Event reason for SCHEDULE_RUNNABLE_CONDITION = False: a previous run of this schedule sits at a phase string written by a NEWER kopiur, so this build can never observe it reach a terminal phase. Under the default concurrencyPolicy: Forbid that stops the schedule permanently, and nothing about the SnapshotSchedule itself would otherwise say so — the silent-wedge shape of #359, one kind removed.