Problem with manual steps of note 1675897

Hello all,

I'm trying to to implement SAP note 1675897, but I'm facing a problem with manual steps. In the manual steps I've to delete STCD5 field from CI_BKNA1 include structure of BKNA1 table, but this include have just this field, so when I try to delete this field I can't activate this structure because it's empty. Someone know how can I solve this issue? Can I delete this structure instead of just delete the field?

SAP Note: http://service.sap.com/sap/support/notes/1675897

Thanks