back posting with material ledger

Dear all,

we activate the material ledger and run it for closing but after running the material ledger we faced some problems

we need to post goods issue in the previous period but the system gives me the following error

Back posting only w.same price control (Cur. month S , Prv . month V) message no. M7087

Diagnosis

The system has discovered that diffrent valuation price control indicators have been maintained for the previous period V and the current period S.