Deprecated function: unserialize(): Passing null to parameter #1 ($data) of type string is deprecated in

@qiutuo

Could you please add more details to the issue summary and Steps to reproduce as well?

Thank you

Changing status

If you add a map field type to a custom content entity or custom field, the Deprecated function: unserialize() message is displayed when the data is output.

@quituo Can you please add steps to replicate the problem?

Which module provides the map field?

Duplicate of 📌 Unserialize(): Passing null to parameter #1 ($data) of type string is deprecated in Drupal\Core\Entity\Sql\SqlContentEntityStorage Needs work