What happened?

Description

When I'm trying to remove my parent inside of the entry from my structure. It keeps on getting back.

Steps to reproduce

1. Attach entry as a child element
2. Go to the entry
3. Remove the parent
4. Save
5. The parent still shows

Expected behavior

Parent to be removed

Actual behavior

Parent is still attached

Craft CMS version

Craft Team 5.6.6

PHP version

8.3.2

Operating system and version

No response

Database type and version

No response

Image driver and version

No response

Installed plugins and versions