You have not yet entered an EAN for the material &

What causes this issue?

You wanted to save the material master record, but have not yet entered
an <DS:GLOS.International_Article_Number>International Article
Number</> (EAN) for any of the units of measure.
Note
This message is of relevance only for retail.

System Response

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

How to fix this error?

Enter an EAN for at least one of the units of measure assigned to the
material.

Procedure for System Administrators

INCLUDE OMT4 OBJECT DOKU ID TX LANGUAGE EN

Error message extract from SAP system. Copyright SAP SE.