Solution : https://service.sap.com/sap/support/notes/1538113 (SAP Service marketplace login required)
Key words : 
open master data change tasks, manual pre-implementation step manually, master data change tasks, terms master data change, configured correctly solution apply, software component   grcfnd_a                      grcfnd_a, run transaction code 'swfvisu'2, manual pre-implement, select 'task visualization'3, select task 'ts76300008'4
Related Notes : 
       
| 1532502 | Process Control 10.0 Support Package 02 - Master Note |