What happened?

Description

I am receiving an "Invalid Entry Type ID: 8" error when I try to delete an entry or revert it to a previous version. The ID 8 is an entry in another site that is not being referenced by the entry I'm trying to delete or change.

I have tried removing all content from the entry I'm trying to delete in order to get past this, but nothing seems to resolve it.

Steps to reproduce

1. Try to delete an entry in my CMS.

Expected behavior

I'd expect the entry to be deleted.

Actual behavior

The error warning appears.

Craft CMS version

5.6.0.2

PHP version

No response

Operating system and version

No response

Database type and version

No response

Image driver and version

No response

Installed plugins and versions