Backdate Transaction for Periodic Cost Method

Hi Experts,

We're using periodic cost method, and somehow user accidently input inventory transaction in prior period which cost period was closed. Now we're reopen the cost period and run create cost distribution but process status automatically become canceled with message as 'The cost org books aren't processed because final accounted distributions exist after the period start date'

So what can we do the process those backdate inventory transactions?

Regards,

Yuan