Now that I have been writing for a while sometimes I get an idea about the topic, but then I remember I've already written about that. I fear that someday I don't remember that and write the same story again.
But maybe it wouldn't be that bad idea after all. Maybe I have some new angle to that idea. Or maybe I have learned something new about it.
It's good to iterate things from time to time. It's one kind of change, improving those ideas.
There is also the fact that you can only say so much with 1400 characters and sometimes there are things that don't fit into that. Or there are details to be addressed. In those cases I hope I don't forget to write more about the topic.
I hope that whenever if I'm writing about same topic I will have something new to say about it instead just repeating myself.