Since the automation code for Line 1 and 2 are identical, I usually try modifying Line 2 code and leave Line 1 original in case I need to revert back to it. But this can cause problems like seen in this video, where I hadn't updated the Line 1 code and it kicked into Assist mode by thinking that the dimmer on Line 2 was overloaded (i.e. over 100%).
Since the automation code for Line 1 and 2 are identical, I usually try modifying Line 2 code and leave Line 1 original in case I need to revert back to it. But this can cause problems like seen in this video, where I hadn't updated the Line 1 code and it kicked into Assist mode by thinking that the dimmer on Line 2 was overloaded (i.e. over 100%).