CB

Old sample data fields before CB 1.9 were created with reserved field ids. These fields need to be properly migrated, but changing their ids could break some parameter usages. Regardless the migration needs to occur as it's causing conflicts with new internal fields like the alias field.

https://www.joomlapolis.com/forum/146-general/235543-after-update-to-2-1-cb-phone-is-alias-field#289210