Solution : https://service.sap.com/sap/support/notes/1019735 (SAP Service marketplace login required)
Key words :
modification dialog box, attached correction instructions, correction contained, edit classes, system displays, generation indicator, terms seo_clif_save_all, seo_class_generate_complete reason, note 983212 deletes, assigned genflag
Related Notes :
| 983212 | Forward declaration is not deleted from metadata |