If you are planning to implement Procurement for Public Sector (PPS) into Supplier Relationship Manager (SRM) module, SAP recommends that you first archive old purchase orders, shopping carts, confirmations and workitems. This is important because there are new fields that are created in SRM that occur upon the implementation of the PPS module. The recommendation is to first archive the SRM data and then implementing PPS.
If PPS is already implemented, you may have an issue with the newest SAP notes. The issue is a new check on deleted shopping carts, which causes archiving object BBP_SC to dump. SAP has delivered note 1954621 to allow BBP_SC resume working and it only provides errors and not dumping when a deleted shopping cart are found in archiving run.