Document Numbering Overlapping

Dear Experts,

We are using SAP B1 9.2 PL 05 and facing the following issue. In the form of Incoming Payments we have a serie which numbering starts i.e for 10001 to 19999. We observe that there is a gap of numbers (i.e between 10100 and 10105). The numbers that are missing have been issue by using the manual series.

We have tried to reproduced the scenario in a test database but with no success.

Do you have face it before? Do you have any advice?

Kind Regards,

Alexandros Karadimitropoulos