Destination type for inventory item changed to expense item in PO distribution

Hi All,

We are changing the destination type for the item from inventory to expense in PO distribution.

For this the PO Accrual account is not defaulting from Purchasing options, it is generating some other account.

We are unable to find the cause from where the account is generating.

How to default the account from purchasing option.

Please share your valuable suggestions.

Thanks In Advance