"Historical Status is invalid" message while generating PDS for iPPE Structure with Change Number

Hi,

   We are Testing ECM successful iPPE with parameter effectivity, we person maintained a alteration fig for the operation nodes successful merchandise structure. While generating PDS for iPPE operation with ECM (Parameter effectivity) , strategy done connection for Structure node "historical presumption is invalid" successful log.

If we utilized the aforesaid iPPE operation with ECM without Parameter Effectivity, PDS got generated successfully. But erstwhile we make alteration fig with parameter effectivity, we are getting "Historical presumption is not valid".