Error message when adding Custom Column

[Anonymous]

I am trying to follow the instruction in the following link  Solved: Removing duplicates - Microsoft Power BI Community

in an attempt to remove duplicates (CQTitle) based on the date (DteofCQ).

Everytime I attempt to add a custom column (as instructed in the link) I get the 'yield' sign.

Is this a delegation error or some other type of correctable error?

[Anonymous · Accepted solution]

Resolved. The proper table name was Sorted Rows, and need to be written with quotes:

= Table.AddColumn(#"Sorted Rows", "Most Recent Docs", each let MostRecentDate = [DteofCQ] in "Sorted Rows"([All Rows],each[DteofCQ] = MostRecentDate))