Serial number &2 already assigned to order &1

What causes this issue?

The serial number &V2& is to be distributed to a manufacturing execution
system (MES) with the current production order. However, it is already
assigned to production order &V1&. As a rule, a certain serial number
may only be distributed to an MES once.

System Response

The system issues a warning if production order &V1& is not relevant for
distribution to an MES.
However, if production order &V1& is also relevant for distribution to
an MES or has already been distributed there, the serial number &V2&
cannot simply be assigned to the current order. Depending on the system
setting, the system issues a warning or an error message.

How to fix this error?

Choose another serial number.

Procedure for System Administrators

You can define the scope of check for serial numbers in MES-relevant
production orders in the <DS:SIMG.TCOSERNRCHECK>Implementation Guide</>.

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.