REQUIRED_FIELD_MISSING

A Salesforce restore operation on an object record that has fields that are configured to require values fails with an error.

Symptoms

A restore operation fails with the following error:

Custom_object__c record a0C3M0000008ERXUA2 was not updated. Error message: REQUIRED_FIELD_MISSING:Required fields are missing: [Custom_id_field__c]:Custom_id_field__c --

Causes

Fields that are configured to require values do not have values.

Resolution

Try one of the following resolutions:

• Clear the Always required a value in this field in order to save a record check box, as follows: 
  1. In Salesforce, go to Setup > Objects.
  2. Select the object that is referenced in the error message.
  3. Select the field that is referenced in the error message.
  4. Clear the Always required a value in this field in order to save a record.
  5. Click Save.
  6. Run the restore operation again.
• In Salesforce, update the field on the object record that is referenced in the error message to have a valid field value. After updating the field value, perform a backup operation, and then run the restore operation again.