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Add a new column that contains the row number.
Add a row number starting at 1:
•Set Start at to the number you want to use for the first row.
•Set Increment to the amount you wish to increment by.
•set Every to how often to apply the increment (e.g. set to 5 to increment once every 5 rows).
•You can Pad the row number with zeros to turn it into a column of unique Ids with a fixed length.