Automatic add value to Valuation price field when creat PR

Dear all

I have issue when I create PR.

I User Me51n T.code. Put value from left to right: Material -> Quantity -> Plant -> Valuation price (field in Line item), Valuation price filled: 312000 - for example. After I fill 4 field before, I click "Enter". Valuation price field automatic add value from: 312000 -> 31 200 000.

Does any one meet this error like me?

Please help me.

Thank you so much.