Why Database Schema Diagrams Become Outdated and How to Fix It

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Schema diagrams frequently fall out of sync with actual databases because they are static files that no one updates after migrations run. When a developer adds or renames a column, the diagram stored in Confluence, Figma, or a repo image remains unchanged, creating a misleading source of reference. Responsibility for updating diagrams typically falls between teams, so updates are perpetually deferred. The recommended fix is to auto-generate diagrams directly from the live database on every deployment or pull request, rather than maintaining them manually. For teams wanting version control, the generated output can be committed as an SVG or Markdown file and enforced via CI checks that fail if the diagram does not match the current schema.

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