Aggregation issue for forecast in Getting Started with Snowflake ML Forecasting and Classification

[MLthe]

After creating the forecast, the guide says to "Run the above SQL then click on "Chart" in the results pane. Be sure to add FORECAST as a variable and set "Aggregation" to "None" for both ACTUAL and FORECAST." However, doing so results in an error on the visualization saying: "Duplicate data points detected. Consider adding a series or aggregation function"