Problem/Motivation
When you create a Landing Page Section with a Featured Block and then Duplicate the block and Save the Node you see this error:
Reference: this field cannot hold more than 1 values.
Proposed resolution
Lets not allow duplication of those blocks if the reference cannot hold more than 1 value.
Comments
Comment #2
jaapjan commentedThis is solved in the Paragraphs update which is in the latest OS release.
https://www.drupal.org/node/2943956