The Reference Assignment was transferred to &1 of &2 plants

What causes this issue?

You have entered a total of &V2& plants. Transfer of these plants to
&V1& has been carried out successfully.

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?

Check the error log in the case that the transfer was carried out for
only a portion of the specified plants .

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.