Hi, I am currently working with Power Query to merge few tables from SQL Server. I have both ID and ITEMID from 2 different tables and columns containing timestamps from 2 different tables combined together as well. What I am trying to achieve is having data with unique combination of ID and ITEMID and flatten the timestamps. (Preview in image below). The issue is it suddenly creating duplicates after "Add Custom" and "Expanded Column" for certain timestamps columns. Thus, when I tried to load the data. I face the error message "There were too many elements in the enumeration". Help on this is greatly appreciated!