Solution : https://service.sap.com/sap/support/notes/181491 (SAP Service marketplace login required)
Key words :
system generates error message n3309 'time overlap, additional key words bapi_caseservice_createmult, error possibly occurs, program error, identical service', service entry, extended service, service processing, advance correction, bapi_caseservice_changemult
Related Notes :
| 153153 | IS-H: Composite note on important errors in 4.03A |