A rollback is the process of returning an app, database, or system to a previous state, undoing recent changes that caused an error or unwanted behavior. It's a safety net: when something breaks, you can revert to a version that worked.
What Is a Rollback?
How a rollback works
As you make changes to an app, earlier working versions are kept. A rollback restores one of those earlier versions, reversing the changes made since. Depending on the system, that might mean reverting to a saved snapshot or undoing a set of recent edits. The result is the same: the app returns to how it was before the problem was introduced, without you rebuilding it by hand.
Examples
You add a new feature and it breaks something that was working. Instead of tracing and fixing every change, you roll back to the version from before the feature, then try again. When building on Emergent, if a change takes your app in the wrong direction, you can return to an earlier working state rather than starting over.
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