Error in determination of doc. number for quantity flow at article level

What causes this issue?

An error occurred during document number determination for the article
quantity flow-specific declaration.

System Response

No article quantity flow-specific data can be saved for the
declaration.

How to fix this error?

Please check the settings for number range object "J_7LBELEG" for
interval "03".

Error message extract from SAP system. Copyright SAP SE.