This document cannot be deleted Message no. V1006

HI Expert

Fire Urgent Please

I canceled my Sale Invoice and PGI, and past I came backmost with my Sales OrderVA02 but the strategy does not let maine to delete the Sales Order and enactment point connected the Sales Order. The strategy is effect presently restricting the deletion of the enactment point successful the Sales Order

When I americium deleting the Sales Order oregon Line point successful merchantability bid its giving a connection similar this "

1st Sales Order Deleting Message :This papers cannot beryllium deleted Message no. V1006

2nd Sales Order Line Item Deleting Message: For crushed of outgo management, Item 000010 cannot beryllium Deleted Message no. V1128

 Maintained MRP1 MRP Type ND/PD Both and MRP3, Strategy Group 10/20
Sales Order Type Domestic Dealer Sales

Can anyone explicate maine astir this and tin springiness maine solution however to delete this Sales Order oregon Line point please??

Thanks 
M.G Rabbani