# Diagram references have machine-generated titles

**What you are seeing**

Diagram Reference macros are showing gibberish machine titles.

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## Why it happens

An earlier bug leaked internal titles onto migrated references.

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## What to do

The Repair diagram tabs tool detects and replaces these, alongside its tab work.

ℹ️

There is a tool for this: **Repair diagram tabs**. It fixes the affected pages forward without re-running the migration.

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## Related

[Catalogue thumbnails for migrated diagrams are blankCatalogue thumbnails for migrated diagrams have gone blank.](https://help.gocapable.com/migration/catalogue-thumbnails-for-migrated-diagrams-are-blank.html)

[Thousands of draw.io macros failed on invalid diagram contentThousands of draw.io macros failed with a message about invalid diagram content.](https://help.gocapable.com/migration/thousands-of-draw-io-macros-failed-on-invalid-diagram-content.html)

[Repair and rollbackThe tool that fixes this.](https://help.gocapable.com/migration/repair-diagram-tabs.html)

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