Clearing document could not be created (ext. number assignment activated)

What causes this issue?

External <DS:GLOS.3526B526AFAB52B9E10000009B38F974>number assignment</>
is active for <DS:GLOS.3526B521AFAB52B9E10000009B38F974>number range</>
&V1& in company code &V2&. Therefore, it was not possible for the system
to assign a document number for the clearing of open items.

System Response

The posting is terminated.

How to fix this error?

To be able to switch to <DS:GLOS.3526B894AFAB52B9E10000009B38F974>open
item management</>, you have to use a number range with internal number
assignment.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.