We have released an option to split an existing flight series, which will allow you to split a flight series for changes for the series.
For example, changing the flight number, destinations etc.
The new option exists on the Flight Series management screen.
To split a flight series, simply select the flights that you want to move to a new flight series record from the left side and select "Split flight series" from the menu and then "Take action"
The new flight series will be created, the existing flight series settings will not change, for example, if you split a flight series which was from 01/Apr-31/Dec into 2 different flight series, and the split is done on the 01/June, then the original flight series dates will remain the same.