Call to undefined method stdClass::unsetRelation()

[antonioribeiro]

Description

We re getting this error when rendering blocks on preview. This is the line that might have introduced the bug.

Steps to reproduce

It's being generated by having browsers to related items in the block editor.

Versions

Twill version: 3.4 Laravel version: 11 PHP version: 8.3

/cc @Tofandel