# Records are merged, duplicated or lose history

Prompts to start with when a PostgreSQL database shows this problem.

- [Find where records silently change identity](https://atlasscope.dev/prompts/find-where-records-silently-change-identity): Sources use aliases, changing identifiers, share classes or inconsistent names for the same thing.
- [Reproduce what the database believed in the past](https://atlasscope.dev/prompts/reproduce-what-the-database-believed-in-the-past): Past reports, backfills, restatements or changed classification rules matter.
- [Links between records worth adding](https://atlasscope.dev/prompts/links-between-records-worth-adding): Finds links between records worth adding, and ones the evidence does not support.

Source: https://atlasscope.dev/fix/records-are-merged-duplicated-or-lose-history