SLA Changes required for ERV Account when we use Period end accrual

 Hi Folks,

If we follow Period End accrual Method in PO, if PO rate and Invoice rate is having some difference it will  go to ERV account, if we process the same transaction related to Asset item, ERV account combination is copying as Item Expense account combination it is creating an issue in Depreciation part.

So how we can restrict this ERV account combination as another account i.e other than Item expense account. please suggest SLA changes to achieve this.