The info structure is already used for another method

What causes this issue?

Info structure &v1& is already being used for another product
allocation method.
An info structure can only be use for the product allocation procedure,
for which the same product allocation method (discrete or cumulative)
is being used.
The product allocation method is set in the product allocation
procedure.

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?

If you want to use the product allocation method set, you must use a
different info structure for this procedure.
If you want to use info structure &v1&, then you must change the
product allocation method for procedure &v2&.

Error message extract from SAP system. Copyright SAP SE.