Since this change affects only your C-track kids try this:
1. Run the backup utility (Legacy database only)
2. Go to Admin > Club Setup > Club Names, Logos, Dues & Points and click "New Club". Click ok to the confirmation to open the "New Club" dialog box.
3. In the "Name" section, enter a new Club Name (similar to, but slightly different, than the current C-track club name) and select the appropriate Base Club.
4. In the "Club Calendar" section, select the radio button to "Create a new set of dates", enter the starting and ending dates for the new club night, then enter dates to exclude within the starting/ending range.
5. Click the "Create the New Club" button.
6. When the process completes, close the dialog.
7. Go to Club Setup > Club Assignments tab. For relevant grades, change the Club Name from the old C-track club name to the new C-track club name. This should update all clubbers to the new club.
8. Go back to Club Names, Logos, Dues & Points tab and delete the old C-track record for the wrong club night.