Solution : https://service.sap.com/sap/support/notes/704586 (SAP Service marketplace login required)
Key words : 
characters = 1decimal places = 0save, enter short text 'character, length 1'data type = charnumber, data element crm_ace_proc_status, enter domain crmchar1, terms crmb reason, call transaction se11, active domain crmchar1, activation error occurs, domain manually
Related Notes : 
       
| 782140 | OCS: Known problems with Support Packages in Basis Rel. 6.20 | 
| 447925 | OCS: Known problems with Supp. Packages in Basis Rel.6.20 |