Do we need a staging schema for replicating the value? But in V7 the values get automatically replicated right?

Hi All,I am recently facing an issue like if I am creating a custom schema with dataSource="nms:extAccount:ffda"  it is not replicating in the xxl schema and I have also started the replication workflow. Could you please help me with this?

 Same error . 

 here are the structures.

 still not working 

  Again error .

Hi All, I am currently working in Adobe V8. I have created a schema using autopk and also gave there a pk sequence. But when I am trying to insert data into that schema using xtk.session.Write unable to find key values of elements .  I am attaching code and error syntax .