Group by gives error - Power Query

Hi all

I am doing a group by ID in Power Query with the following code:

= Table.Group(
#"Changed Type", {"Id"}, 
{
{"Title", each Text.Combine(List.Distinct([Title]),", ")}, 
{"Status", each Text.Combine(List.Distinct([Status]),", ")}, 
{"Category", each Text.Combine(List.Distinct([Category]),", ")},
{"PO Placed?", each Text.Combine(List.Distinct([#"POplaced?"]),", ")},
{"Project Type", each Text.Combine(List.Distinct([Project Type]),", ")},
{"Zone", each Text.Combine(List.Distinct([Zone]),", ")}, 
{"Region", each Text.Combine(List.Distinct([Region]),", ")},
{"Country", each Text.Combine(List.Distinct([Country]),", ")}, 
{"Bottler", each Text.Combine(List.Distinct([Bottler]),", ")},
{"Package", each Text.Combine(List.Distinct([Package]),", ")},
{"OEM", each Text.Combine(List.Distinct([OEM]),", ")},
{"LineSpeed", each Text.Combine(List.Distinct([LineSpeed]),", ")},
{"Description", each Text.Combine(List.Distinct([Description]),", ")},
{"Annual Capacity (Unit Cases)", each List.Max([#"Annual Capacity (Unit Cases)"]), type nullable number}, 
{"CAPEX (USD)", each List.Max([#"CAPEX (USD)"]), type nullable number}, 
{"Purchase Order Date", each List.Max([Purchase Order Date]), type nullable date}, 
{"Estimated Start-Up Date", each List.Max([#"Estimated Start-Up Date"]), type nullable date}}
)

Everything works well except for the region column, which was added with a merged columns feature as seen below:

Here is the error it shows:

Expression.Error: The column 'Region' of the table wasn't found.
Details:
Region

What could be wrong?

Please click on the photos to zoom in.

Thanks.