3468007 - Purchase Order document number is not sequential

There is an issue with Purchase Order number sequence. System generates PO number is ascending and descending order in some of the cases.

SAP S/4HANA Cloud

1. Create a Purchase Order in app Manage Purchase Order.
2. The PO is created and the document number "450000009" is generated.
3. Create a copy of the PO 450000009.
4. The document number of the copied PO is "450000001".

Standard system design.

In general, system assigns the Purchase Order number range in the sequence itself. If user deletes any purchase orders, then those numbers will not be there in the system and thus sequence number cannot be maintained.

For Purchase Orders, system does not guarantee the sequential numbering or no gap numbering. But system assures that there will be no duplicate numbering. Since 'In Preparation' Purchase Orders can always be deleted, the 'No Gap' requirement cannot be fulfilled. So, the lost number can be allocated at any point of time in future randomly.

62077 - Info: Internal number assignment has gaps.

1855914 - Possible reasons for gaps in material document number range - SAP ERP & SAP S/4 HANA

Purchase order number range, MM-FIO-PUR-PO, document number, S4HC, X4BC, S4_1C, S4_PC, PO, sequential, gaps in document number, PO , KBA , MM-FIO-PUR-PO , Fiori UI for Purchase Orders , Problem

SAP S/4HANA Cloud Public Edition all versions ; SAP S/4HANA Cloud all versions