How to connect a data store to a record

I include my entire code, remaining the same error:

a!localVariables(
  local!data,
  {
  a!gridLayout(
    label: "Invoice Details",
    headerCells: {
      a!gridLayoutHeaderCell(label: "Purchase Order"),
      a!gridLayoutHeaderCell(label: "Date"),
      a!gridLayoutHeaderCell(label: "Total Value"),
      a!gridLayoutHeaderCell(label: "Material"),
      a!gridLayoutHeaderCell(label: "Supplier"),
      a!gridLayoutHeaderCell(),
      a!gridLayoutHeaderCell()

    },
    columnConfigs: {
      a!gridLayoutColumnConfig(width:"DISTRIBUTE"),
      a!gridLayoutColumnConfig(width:"DISTRIBUTE"),
      a!gridLayoutColumnConfig(width:"DISTRIBUTE"),
      a!gridLayoutColumnConfig(width:"DISTRIBUTE"),
      a!gridLayoutColumnConfig(width:"DISTRIBUTE"),
      a!gridLayoutColumnConfig(width:"ICON"),
      a!gridLayoutColumnConfig(width:"ICON")
      
    },
    rows: a!forEach(
      items: local!data,
      expression: a!gridRowLayout(
        contents: {
          a!textField(
            value:fv!item['recordType!{d269796e-dcd7-46b6-8ecf-55ed16bf54a1}PTPP Invoice Lines.fields.{ab97d392-b365-425a-a0e5-116da756c87a}id_orden'], 
            saveInto: fv!item['recordType!{d269796e-dcd7-46b6-8ecf-55ed16bf54a1}PTPP Invoice Lines.fields.{ab97d392-b365-425a-a0e5-116da756c87a}id_orden'],
            required: true                    
          ),
          a!textField(
            value:fv!item['recordType!{d269796e-dcd7-46b6-8ecf-55ed16bf54a1}PTPP Invoice Lines.fields.{25003162-d3d0-4466-86f8-471cb1e37589}fecha_orden'], 
            saveInto: fv!item['recordType!{d269796e-dcd7-46b6-8ecf-55ed16bf54a1}PTPP Invoice Lines.fields.{25003162-d3d0-4466-86f8-471cb1e37589}fecha_orden'],
            required: true                    
          ),
          a!textField(
            value:fv!item['recordType!{d269796e-dcd7-46b6-8ecf-55ed16bf54a1}PTPP Invoice Lines.fields.{c228ed4c-21cb-4af4-a313-88f26e7874da}total_orden'], 
            saveInto: fv!item['recordType!{d269796e-dcd7-46b6-8ecf-55ed16bf54a1}PTPP Invoice Lines.fields.{c228ed4c-21cb-4af4-a313-88f26e7874da}total_orden'],
            required: true                    
          ),
          a!textField(
            value:fv!item['recordType!{d269796e-dcd7-46b6-8ecf-55ed16bf54a1}PTPP Invoice Lines.fields.{5f4060f6-827d-41b5-88e7-0328ec1309bc}Material'], 
            saveInto: fv!item['recordType!{d269796e-dcd7-46b6-8ecf-55ed16bf54a1}PTPP Invoice Lines.fields.{5f4060f6-827d-41b5-88e7-0328ec1309bc}Material'],
            required: true                    
          ),
          a!textField(
            value:fv!item['recordType!{d269796e-dcd7-46b6-8ecf-55ed16bf54a1}PTPP Invoice Lines.fields.{d9317466-7426-47af-bd64-22a998c636e6}id_proveedor'], 
            saveInto: fv!item['recordType!{d269796e-dcd7-46b6-8ecf-55ed16bf54a1}PTPP Invoice Lines.fields.{d9317466-7426-47af-bd64-22a998c636e6}id_proveedor'],
            required: true                 

          ),
          a!richTextDisplayField(
            value: {
              a!richTextIcon(
              icon: "times-circle",
              link: a!dynamicLink(
                saveInto: local!data,
                value: remove(local!data, fv!index)
              ),
              linkstyle: "STANDALONE",
              color: "NEGATIVE",
              showwhen: a!isNullOrEmpty(fv!item['recordType!{d269796e-dcd7-46b6-8ecf-55ed16bf54a1}PTPP Invoice Lines.fields.{ab97d392-b365-425a-a0e5-116da756c87a}id_orden'])
              )
            , 
              a!richTextIcon(
               icon: "trash",
               color: "NEGATIVE",
               showWhen: a!isNotNullOrEmpty(
                 fv!item['recordType!{d269796e-dcd7-46b6-8ecf-55ed16bf54a1}PTPP Invoice Lines.fields.{ab97d392-b365-425a-a0e5-116da756c87a}id_orden']),
                 
               link: a!dynamicLink(
                 saveInto: local!data,
                 value: remove(local!data, fv!index)
               )
               
            )
            }
          ),
          a!richTextDisplayField(
            value: a!richTextIcon(
              showWhen: a!isNotNullOrEmpty(
                fv!item['recordType!{d269796e-dcd7-46b6-8ecf-55ed16bf54a1}PTPP Invoice Lines.fields.{ab97d392-b365-425a-a0e5-116da756c87a}id_orden']),
              icon: "floppy-o",
              color: "POSITIVE"
            )
          )
        }
      )
    ),
    addrowlink: a!dynamicLink(
      saveInto: local!data,
      value: append(
        local!data, 
       'recordType!{d269796e-dcd7-46b6-8ecf-55ed16bf54a1}PTPP Invoice Lines'()
      ),
      label: "Add new Invoice Line"
    )
    ),
  a!buttonArrayLayout(
    align: "END",
    buttons: {
      a!buttonWidget(
        label: "Write to the Database",
        style: "PRIMARY",
        saveInto: a!writeRecords(
          records:local!data,
          onSuccess: a!save(local!data, fv!recordsUpdated)
        ),
        validate:true
      )
    }
  )
}  
)     

OK. And the error shows up when your do ... what?

the error shows up at the moment I replace the a!text field with the record fields

              a!textField(value:fv!item.idOrden, saveInto: fv!item.idOrden), --->  a!textField(value:fv!item[record])

Could this error happen because in my record I have different types of data? (text and dates). It´s the only difference I found comparing with the video

I think this is because the is "something" in that local variable. To make sure this is an empty list, can you try to change the definition of that local to "{}" and click the "TEST" button.