Paging grid validations

I assume that your post is around the validation, correct? What exactly do you mean with "not matching with old CDT"? Do you have any code you can share?

Not much to go on but here you go:

a!localVariables(
  local!cdt: {
    a!map(sno: 1, sname: "qef"),
    a!map(sno: 2, sname: "abc")
  },
  a!gridLayout(
    label: "Editable Grid",
    labelPosition: "ABOVE",
    headerCells: {
      a!gridLayoutHeaderCell(label: "Sno"),
      a!gridLayoutHeaderCell(label: "Sname")
    },
    columnConfigs: {},
    rows: a!forEach(
      items: local!cdt,
      expression: a!gridRowLayout(
        contents: {
          a!textField(
            value: fv!item.sno,
            saveInto: fv!item.sno,
            readOnly: true
          ),
          a!localVariables(
            local!value,
            a!textField(
              value: local!value,
              saveInto: local!value,
              validations: if(
                local!value <> fv!item.sname,
                "Name doesn't match",
                ""
              )
            )
          )
        }
      )
    )
  )
)