You could also use the Valorisation Bases (in V_512W_B)to carry to the current pay the retroactive variations. As mentioned by Frederick, you'll need to create two Outflow/Inflow WTs (such as /X29 ans /Z29)
![Valuation Basis.png]()
and process your WT /229 in special PCRs in your retroactive calculation sub-schema.
![Outflow-Inflow.png]()