2951911 - Error Only one tax rate allowed for tax type ABC and rate type PQR(country XXX)

This error could occur in any Purchasing document (Purchase order ,Supplier invoice)or sales document(sales order,customer invoice)

In the error ABC is the tax type like Value Added Tax ,PQR is Tax rate type like Standard and XXX is country name like germany

SAP Business ByDesign

tax rate is wrong, wrong tax rate type,Only one tax rate allowed for tax type Value Added Tax and rate type Standard(country Germany) , KBA , only one tax rate permitted , AP-TTE-TC , Tax Calculation , AP-SIP , Supplier Invoice Processing , AP-POP-PO , Purchase Order , AP-CI , Customer Invoice Processing , AP-SLO , Sales Order Processing , Problem