Drupal Error Message "Undefined array key "target_type" EntityReferenceItem.php:778"

Question

After upgrading to Drupal 10.2.2 (from 10.1.5), each time I try to update database or rebuild cache, I get a WARNING message related to the EntityReferenceItem class

Commands:

drush updatedb

OR

drush cr

Message:

 [warning] Undefined array key "target_type" EntityReferenceItem.php:778
 [warning] Undefined array key "handler_settings" EntityReferenceItem.php:779
 [warning] Undefined array key "target_type" EntityReferenceItem.php:778
 [warning] Undefined array key "handler_settings" EntityReferenceItem.php:779
 [warning] Undefined array key "target_type" EntityReferenceItem.php:778
 [warning] Undefined array key "handler_settings" EntityReferenceItem.php:779
 [warning] Undefined array key "target_type" EntityReferenceItem.php:778
 [warning] Undefined array key "handler_settings" EntityReferenceItem.php:779
 [warning] Undefined array key "target_type" EntityReferenceItem.php:778
 [warning] Undefined array key "handler_settings" EntityReferenceItem.php:779
 [warning] Undefined array key "target_type" EntityReferenceItem.php:778
 [warning] Undefined array key "handler_settings" EntityReferenceItem.php:779
 [warning] Undefined array key "target_type" EntityReferenceItem.php:778
 [warning] Undefined array key "handler_settings" EntityReferenceItem.php:779
 [warning] Undefined array key "target_type" EntityReferenceItem.php:778
 [warning] Undefined array key "handler_settings" EntityReferenceItem.php:779
 [warning] Undefined array key "target_type" EntityReferenceItem.php:778
 [warning] Undefined array key "handler_settings" EntityReferenceItem.php:779
 [warning] Undefined array key "target_type" EntityReferenceItem.php:778
 [warning] Undefined array key "handler_settings" EntityReferenceItem.php:779

Have you seen this error before? Any clues of how to solve it?

Thanks,

Did some research online. Looked for patches to core ("Entity Reference") and "Dynamic Entity Reference" contributed module.

Answer 1

I think I did fix it going up to version 4 of Dynamic Entity Reference and after do drush updb:

composer require 'drupal/dynamic_entity_reference:4.x-dev@dev'
    
drush updb