Undefined array key "..." DynamicEntityReferenceItem.php:759

Thanks, seems harmless to add.

I think this likely indicates your config might be corrupt

Do we need to the same fix in 4.x?

I cherry-picked 👍️

Just to add we saw this after upgrading to Drupal 10.2.2.

Moving from DER 3.1.0 to dev branch fixes the issue.

I am sceptical this happened because of corrupt config for the field, because if I create a duplicate field with the same options, the exported configuration is identical (except for field name etc).

If it's of interest, the configuration is publicly visible at

https://github.com/ministryofjustice/prisoner-content-hub-backend/blob/m...
https://github.com/ministryofjustice/prisoner-content-hub-backend/blob/m...
https://github.com/ministryofjustice/prisoner-content-hub-backend/blob/m...

Got virtually the same issue when upgrading to Drupal 10.2.2
Using DER 3.1.0
In my case, I get this during the upgrade itself (composer) but also running (drush updb, drush cex, and drush cr)

 [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

An equivalent patch for anyone using v3.1.0.

FYI we'll have a new release out when 📌 For 10.2 and above the logic to prevent field hooks relating to selection needs to target a different hook Active is fixed for 4.x
It has been merged into 3.x so its not far off.
Thanks for your patience

FYI on our site we ran into this because of Build Hooks.. still trying to track it down.

Ah so base fields perhaps?

Either way, there's a new release out with this in it, please upgrade and report back 👍️

Thank you. Yes, the new stable release appears to have resolved the problem.

Yes, my problem disappeared when I installed DER 3.2.0
Thanks.

Automatically closed - issue fixed for 2 weeks with no activity.