Solution : https://service.sap.com/sap/support/notes/203230 (SAP Service marketplace login required)
Key words :
system -> user profile -> hold data, additional key words esc, effective number range interval, attached program corrections, external number assignment, valid number interval, held order number, valid number, order number, incomplete number
Related Notes :
| 333356 | Internal order: order nmbrs nt assignd continuously |