Error after importing section/template that contains blocks with paragraphs without available source content

This is still a problem in 1.2.2

Limiting this further - this is specifically a problem with paragraphs in inline blocks where the inline block was saved as part of a layout before creating a section template.

This is because the following code embeds the parent_id from the original inline_block and that parent_id is carried over to the clone as well as any further blocks created using the template.

        $paragraph = \Drupal::entityTypeManager()->getStorage('paragraph')->load($value[$key]['target_id']);
        $new_paragraph = $paragraph->createDuplicate();
        // It's important to save the entity in the IEF - complex case.
        $new_paragraph->save();
        $new_value[$key]['target_id'] = $new_paragraph->id();
        $new_value[$key]['target_revision_id'] = $new_paragraph->getRevisionId();

You can see that the entity_clone module was having a similar issue, and their fix was to NOT save the paragraph after creating a duplicate.
https://www.drupal.org/project/entity_clone/issues/3060223#comment-14327338 →

Attaching a patch from the MR

Reproducing the bug.

I have not tested the fix yet.

I wonder if the problem also occurs more generally with any entity reference revision fields.

Hi,

Confirming that there is no problem with entity reference revisions field on node entity for example.

Fix with MR is ok with paragraphs.

@grimreaper thank you for reviewing!