Material no. of serial no. &1 (&2) not equal to doc. material no. &3

What causes this issue?

The <DS:GLOS.material_number>material number</> &V2& of the
<DS:GLOS.serial_number>serial number</> &V1& is not equal to the
document material number &V3&. This could be because, for example, the
serial number of the material number has been changed.

System Response

The system ignores the serial number.

How to fix this error?

Check the serial number.

Error message extract from SAP system. Copyright SAP SE.