What causes this issue?

The document type you specified has been allocated to a number range in
fiscal year "&v3&" that has not been created.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check the configuration of the number range for the specified document
type. Create this number range if it does not already exist or allocate
a valid number range for the document type.


&NOTE&
Enter '9999' as the year if you want to use number ranges that are not
dependent on a particular fiscal year. If you do this, the number range
you allocate is then valid for the current and all following years.
If you want to use number ranges that are dependent on a fiscal year,
you should create these manually for the years you require using the
<LS>Copy by fiscal year</> function.

Error message extract from SAP system. Copyright SAP SE.