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2. How I Restored My Database from a Me... How I Restored My Database from a Memory Dump.md

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   # How I Restored My Database from a Memory Dump

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   Yesterday evening, I was coding on my free-time project and dared touching some back-end code and a database schema.

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   I wanted to rename a key in a collection from `created` to `createdAt`, nothing complicated; Renaming a key in MongoDB normally is as simple as calling `Schema.updateMany({}, { $rename: { oldKeyName: 'newKeyName' } })`, but for some reason it didn't work. After [going through the docs](https://mongoosejs.com/docs/timestamps.html), I found out this was not possible for that specific key name: