Updating dates of completed tasks

frobison14816 ✭✭✭
edited 12/09/19 in Smartsheet Basics

I accidentally changed a predecessor for a task (actually added it to a summary task), and the system then changed all the starting dates for the indented tasks - ie, they all inherited this date. However some of the indented tasks has been marked complete, yet their start/complete dates changed. This was probably a one-off issue, but is there a way to 'freeze' completed task information?