Number assignment for transfer has failed

What causes this issue?

Items are to be transferred. To carry out this transfer, the system
must determine a unique number. An error has occurred during this
process.


&SYSTEM_RESPONSE
Error message, which stopped the processing.

How to fix this error?

INCLUDE NA_SYSADMIN1 OBJECT DOKU ID TX

Procedure for System Administrators

Use transaction <DS:TRAN.FPN5>FPN5</> to check the number range 01 for
item transfers. The number range must have been created and there must
be free numbers in the number range. If this is already the case, check
using transaction SE16 for table FKKUMBHI whether numbers have already
been allocated which are higher than the current level of the number
range. If this is the case, change the level of the number range.

Error message extract from SAP system. Copyright SAP SE.