PUP differ from period to period

Dear Experts,

we have material ledger actual costing active, we run CKMLCP at end of the period when analyse the material master we found the PUP price differ from period to period in accounting view of material master,

Exp- run CKMLCP for period "7" PUP is 1000 the same value should show in period "8" also, bcoz CKMLCP is not run for period "8"

but system is showing 1200 fer period 8.

please help to resolve the issue.

Thanks & Regards,