Price too low (below tolerance limit of & %)

What causes this issue?

The invoice price (value invoiced divided by the quantity invoiced)
varies too greatly from the net order price.
INCLUDE MM_IV_MELDUNGEN OBJECT DOKU ID TX

System Response

The system has established that the value invoiced is below the
expected price (quantity invoiced * net order price) by more than the
tolerance for price variances (&V1& %) set in the Customizing system.

How to fix this error?

Check what you have entered and make any necessary corrections.

Error message extract from SAP system. Copyright SAP SE.