Number range & is not defined for object &

What causes this issue?

The <FM:number_range>number range you have specified does not exist for
the object in question.

System Response

Error message. Internal number assignment is not possible.

How to fix this error?

Assign a number range to the object. You can maintain the number ranges
for various objects using <FM:Customizing>Customizing</>.

Error message extract from SAP system. Copyright SAP SE.