When cleanup is still normal preparation
Cleanup is still more ordinary when your team is identifying duplicate records, incomplete fields, or export formatting questions that are visible but not yet changing the real migration decision.
That kind of preparation can still be consequence-aware without pretending every detail is already solved.
When cleanup uncertainty needs a narrower lane
Move into guided review when cleanup uncertainty now affects stakeholder confidence, likely scope, reporting meaning, or whether your church can judge migration readiness honestly from the current information.
The point is not to dramatize cleanup. It is to avoid letting vague reassurance stand in for a real decision boundary.