In July 2023, Google will be upgrading its analytics to version 4. At that point, version 3 statistics will no longer be available in your analytics account.
It’s a good idea to add version 4 to your account as soon as possible, to start gathering new statistics for your website.
After you’ve added v4 to your analytics account, you can switch between v3 and v4 to compare how Google is tracking your website statistics. Here is a short video demonstrating how to switch between v3 and v4: