Production Order Status

No customization and no changes in Setup has been done in the production module but from last 3 days this error Cost value must be negative upon issue from inventory started to come suddenly. 
While ending Production order of status Report as finished this error is come as shown in screenshot 


Same error is also coming while posting invoice of sales order.
I am getting no idea what is the source of this error, i have checked Picking list journal lines and other thing also but not able see anything related to error. 
Please me help into this to find error cause and how i can solve it.

Thanks in Advance.