It seems you somehow duplicate some cells. Here is the guide on how to get a clean copy of your Notebook. But please note that it will also remove your code, so, you may need to download your old notebook or copy your code somewhere else.
It seems you somehow duplicate some cells. Here is the guide on how to get a clean copy of your Notebook. But please note that it will also remove your code, so, you may need to download your old notebook or copy your code somewhere else.