This is a great concise explanation. Thank you for providing it so quickly If you forgive my prying, was this an implementation issue with the maintenance plan

This is a great concise explanation. Thank you for providing it so quickly If you forgive my prying, was this an implementation issue with the maintenance plan (operator or tooling error), a fundamental issue with the soundness of the plan as it stood, or an unexpected outcome from how the validated and prepared changes interacted with the system? I imagine that an outage of this scope wasn’t foreseen in the development of the maintenance & rollback plan of the work.