Critical area of number interval & reached (ENTER=Continue)

What causes this issue?

Number assignment in number range &V1& (for number assignment in
company code &V2&) has reached the warning area.

System Response

If you press <LS>Enter</> the asset will be created.

How to fix this error?

The last few numbers in the number range &V1& have been
assigned.
You have the following choices:
Extend the interval for the number range &V1&.
Assign the asset class with the number range &V1& to another number
range.

Error message extract from SAP system. Copyright SAP SE.