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A category (xxx) that doesn't exist is being referenced

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#47914 (In Topic #10474)

A category is being referenced or linked to by name/identifier, but there is no such category.

How did this happen?

Common causes include:
  1. If you delete a category and then use your back button to try and access what you just deleted.
  2. If you follow a link to a category that has since been deleted.

It is also possible that there is some form of corruption in the database. For example, an entry says it is in a category that doesn't actually exist.

How do I fix it?

Fix any invalid links.

If you believe you have found a bug in the software, report it.

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