Drupal 11.1 Breaking Changes for Custom Entities: What Actually Bites in Production
· 4 min read
Drupal 11.1 does not break public APIs, but custom entity code can still break during upgrades because entity type definitions moved to attributes, some entity-related routes are deprecated for Drupal 12, and entity reference formatter output changed in access-sensitive contexts. If you maintain custom entities, treat Drupal 11.1 as a migration checkpoint, not just a patch-level bump.