Undefined offset 1 in the MenuParentFormSelector.php

This issue is being reviewed by the kind folks in Slack, #needs-review-queue-initiative. We are working to keep the size of Needs Review queue [2700+ issues] to around 400 (1 month or less), following Review a patch or merge request → as a guide.

Tagging for steps to reproduce. #6 mentions content type that doesn't use a menu, tried replicating on D10 but could not
Was previously tagged for tests that will still need to happen.

Thanks!

Patch for 10.1.x.

We're using patch #11 and it fixes our issue.

Create an MR with patch #11
MR: https://git.drupalcode.org/project/drupal/-/merge_requests/8311

Hi @kalpanajaiswal FYI turning existing patches to MR isn't credit worthy unless addressing other points which have not been done. So not saving credit.

Steps are still needed.
Issue summary is incomplete