Just because you had behaviour sorted at age 4 doesn’t mean that you’ve got it together at age 6. Even when you have a perfect routine when your child is 5 it doesn’t mean that this will work when they are 8 years old. 10 year olds still at primary school have completely different needs then those at high school at 13 years.
The years seem short, but the needs of our children change so drastically from year to year. Their brains are growing, their memories are improving, they are distracted by different stimulus, and they are motivated in different ways. A sticker might have worked once, but it loses its appeal as children age.
We are going through a change in needs and motivations at the moment, and it takes energy and patience to work thorough the changes. It takes a little trial and error to re-jiggle things in a family, particularly when you have more than one child, because the sibling relationships change during these times of upheaval too.
It is heathy to ‘look’ at your child in a new light every year, and check that you are parenting them appropriately for their age and stage. Just checking in with their changing needs can make every transition smoother, and home life much calmer.