Multiple Account assignment error in SRM PO

Hi all,

We are using SRM 7.1 extended classic scenario. We are facing an issue where a PO has one line item and for that line item user created 3 lines of account assignment distributed by percentage and the PO is ordered. Now the user goes to the PO and deletes the account assignment (first 2 lines) and changes the third line to 100%, when the PO is ordered again it throws an error that enter a valid G/L account or sum of quantites is less than in background. But if we delete the account assignment line item and manullay add one line its not throwing error.

Is there any note to fix it.

Thanks