SoftDelete issue in Custom object while migrating

@charles @thomast We created two custom objects in v0.23 and then migrated the database to v0.24 using the yarn command:prod upgrade-0.24 command. After the migration, the isSoftDeletable value is correctly set to true or false for both standard objects and newly created custom objects. However, for the custom objects created in v0.23, the isSoftDeletable field is returning NULL.