Drupal\Core\Field\FieldException: Attempt to create a field storage with an name longer than 32 characters: layout_builder__layout_custommode in Drupal\field\Entity\FieldStorageConfig->preSaveNew() (line 326 of core/modules/field/src/Entity/FieldStorageConfig.php).
1) Add view mode with a long name for the node.
2) Enable Layout builder for view mode.
3) Enable the 'Allow each content item to have its layout customized.' option for this view mode.
Probably we can use short machine name prefixes.
lb_layout_custommode instead layout_builder__layout_custommode.
Needs review
1.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
I'm having this issue too. I'd probably suggest hashing the field name in addition to shorten the prefix. I'll try to create a patch
@Ericmaster thanks for MR. Your code looks good, I'll try to test and merge it asap.