Investment order & must be statistical (Correct your entry)

What causes this issue?

You have entered the investment order &V1&. Investment orders can only
be statistical, they cannot be balanced.

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 a statistical investment order.
You can use the matchcode function to help you do this.

Error message extract from SAP system. Copyright SAP SE.