Before posting further queries, please have a look at How to Ask a Question which will guide you how to create a Discussion in SCN. Avoid creating discussion with one line. You need to share more information on in which transaction you were facing this issue, what you tried to find out solution to this issue which will help the members to guide you.
It seems, some Country Specific Document Numbering is missing which you can check in SPRO >
Cross-Application Components > General Application Functions > Cross-Application Document Numbering
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