Solution : https://service.sap.com/sap/support/notes/417920 (SAP Service marketplace login required)
Key words : 
terms db2/390 db2 390abap transport correction fixddic ccms reason, sapservx directory /general/r3server/abap/note, ccms functionality            contrary, release-dependent attachment, sap basis release 6, basis support packages, section solution 1, mandatory transports, earlier versions, collective transports
Related Notes : 
       
| 581269 | Scheduling via DB13C in target DB2/390 system fails | 
| 549174 | Transaction DB03 no longer supported for DB2/390 | 
| 493836 | DB2/390: 6.20 Installation on z/OS, UNIX and Windows | 
| 481752 | DB2/390: Display of DB2 V7 installation parameters in ST04 | 
| 427748 | DB2-z/OS: CCMS corrections (6.10, 6.20, 6.40, 7.x) | 
| 426863 | DB2-z/OS: DB Performance Monitor/IFI Data Collector | 
| 407663 | DB2/390: DDIC corrections (6.10, 6.20) | 
| 393865 | DB2/390: 6.10 Installation on OS/390, UNIX and Windows | 
| 122599 | DB2/390: Performance of the update | 
| 101217 | DB2 z/OS: Overview of transports and corrections |