7.0 to 7.4, Do I need to remove Aggregates / Indices from Data flows

Hi,

In my current work, I have imported some data flows and the related process chains AS-IS from BW 7.0 to BW on HANA 7.4 SP9. In my process chains, do I need to remove process types that do aggregation and create/delete indices? Please provide any reference from SAP documentation as well supporting your answer.