The purchasing group is different to that in the reference plant

What causes this issue?

A purchasing group that differs from the purchasing group of the
reference plant was found for plant &V4&, material &V2& in unit of
measure &V3&.

System Response

Price activation at plant group level may lead to incorrect results for
plant group &V1&.

How to fix this error?

You can activate prices at plant level by changing the price activation
type of plant group &V1&. To do this, change the price activation type
indicator to "Plant" in the plant group overview.

Error message extract from SAP system. Copyright SAP SE.