What happened?

Description

Having a craft instance with:

• 2 groups of sites
  • Group A
    • Site A1 (primary site), Site A2
  • Group B
    • Site B1, Site B2
• the primary site can only be in one group. Only one primary site can exist.

Trying to save an entry that is part of Site B1 or B2 gives an error.

Steps to reproduce

1. Have a craft instance with the structure explained above
2. have entries with a ckeditor field
3. try to save said entry

Expected behavior

the entry saves

Actual behavior

Craft CMS version

5.52

PHP version

8.2

Operating system and version

No response

Database type and version

No response

Image driver and version

No response

Installed plugins and versions