In terms of things that scare me as a developer, stale data is WAAAAYYY less concerning then having people try to shotgun fix an issue on a production server af

In terms of things that scare me as a developer, stale data is WAAAAYYY less concerning then having people try to shotgun fix an issue on a production server after an irreversible update took down the entire system... Especially now that the developer and the entire organization is likely now in a panic state and not thinking clearly. That bug you describe, maybe stale data is part of the problem, but ... why are you having a new person working on the billing system presumably without any code review? It sounds like you have a lot of process issues.