You are carrying out a lexicographical material number conversion

What causes this issue?

Only lexicographical conversion is selected. This means that only
leading zeros are removed, and mapping values are <ZH>not </>considered
during the conversion. Number range intervals are <ZH>not</> converted.

System Response

Check the settings and confirm your decision.

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.