Patterns: Unable to duplicate the pattern without categories

[t-hamano]

Description

When trying to duplicate a pattern that does not have a category in the Site Editor, an error is displayed in the snack bar and the pattern is not duplicated.

After investigating, it seems that the cause is that the categories variable becomes undefined here:

gutenberg/packages/edit-site/src/components/page-patterns/duplicate-menu-item.js

Lines 139 to 140 in b61dde2

	async function getCategories( categories ) {
	const terms = categories.map( ( category ) => {

Step-by-step reproduction instructions

• In the Site Editor, create a pattern without adding categories.
• Attempt to duplicate the pattern.
• There should be an error.
• Add a category to the pattern and save it.
• This time, you should be able to successfully replicate the pattern.

Screenshots, screen recording, code snippet

52047a4c5bd2af427aafa1bbdb80b53c.mp4

Environment info

No response

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes