Power BI Data Flow Refreshing issue when change the column of the excel file located in SharePoint

The two last steps specifically reference the City1 column. This updated query should avoid that.

let
    Source = SharePoint.Files(
        "https://Abcroup.sharepoint.com/teams/DataVisualizationandDashboards519-HandoverfromSanduni",
        [
            ApiVersion = 15
        ]
    ),
    #"Filtered Rows" = Table.SelectRows(Source, each Text.StartsWith([Name], "Sample")),
    #"Filtered hidden files" = Table.SelectRows(#"Filtered Rows", each[Attributes]?[Hidden]? <> true),
    #"Invoke custom function" = Table.AddColumn(
        #"Filtered hidden files", "Transform file (7)", each #"Transform file (7)"([Content])
    ),
    #"Renamed columns" = Table.RenameColumns(#"Invoke custom function", {{"Name", "Source.Name"}}),
    #"Removed other columns" = Table.SelectColumns(#"Renamed columns", {"Source.Name", "Transform file (7)"}),
    #"Expanded table column" = Table.ExpandTableColumn(
        #"Removed other columns", "Transform file (7)", Table.ColumnNames(#"Transform file (7)"(#"Sample file (7)"))
    ),
    #"Transform columns" = Table.TransformColumnTypes(
        #"Expanded table column",
        {
            {"ID", type text},
            {"Description", type text},
            {"Qty", type text},
            {"Value", type text},
            {"Date", type text},
            {"City1", type text},
            {"City2", type text}
        },
        MissingField.Ignore
    ),
    #"Replace errors" = Table.ReplaceErrorValues(
        #"Transform columns", List.Transform(Table.ColumnNames(#"Transform columns"), each {_, null})
    )
in
    #"Replace errors"

Pat