Solution : https://service.sap.com/sap/support/notes/437096 (SAP Service marketplace login required)
Key words : 
transportable customer development class, choose checkbox 'modify', prerequisites program error, appended correction report, correction report, program zrs_smodilog_repair_trsltype, report rsltmod, report rs_smodilog_repair_trsl, symptom translations, reset theentries
Related Notes : 
       
| 485741 | Handling customer translations during the upgrade |