Reverting to previous Wagtail PageRevision fails because of hidden ValidationErrors of attached Inline models

I can't revert to previous PageRevisions of TestPage because of hidden ValidationErrors for attached inline TestChild instances. Instead of a useful error message, I get a generic message:

The page could not be saved due to validation errors

Using a debugger allowed me to get more specific error messages for the "id" field of TestChild:

Select a valid choice. That choice is not one of the available choices.

When inspecting the generated Form for TestChild, there is a forms.ModelChoiceField for the "id" pk field, which causes the ValidationError.

The source code below is not the actual code I am using in my project, but it's enough to reproduce the issue.

class TestPage(Page):
    content_panels = Page.content_panels + [InlinePanel("test_children")]
    parent_page_types = ["wagtailcore.Page"]


class TestChild(models.Model):
    parent = ParentalKey(
        TestPage,
        on_delete=models.CASCADE,
        related_name="test_children"
    )
    name = models.CharField(max_length=255)

I am using

• python 3.12

• wagtail==7.0.2

• Django==5.2.4

• django-modelcluster==6.4

• wagtail-localize==1.12.2

How to reproduce:

1. Create TestPage with at least one TestChild inline model.

2. Publish TestPage.

3. Edit the created TestPage again, delete the TestChild, and add a new one.

4. Publish TestPage and save changes.

5. Go to the history of the edited TestPage and review the previous revision.

6. Click on "Replace current draft".

Expected Outcome: I can revert to the selected previous PageRevision with all data and inline models restored.

Actual Outcome: Restoring PageRevision fails with generic error message "The page could not be saved due to validation errors"

I hope someone can help me with this issue.