You may see this notice when logging into your Google Analytics account:
Universal Analytics will no longer process new data in standard properties beginning July 1, 2023. Prepare now by setting up and switching over to a Google Analytics 4 property.
If you have upgraded to the new Google Analytics 4 and want to get rid of the classic Universal Analytics, you can go to delete a Universal Analytics property from Google analytics account >> admin >> property >> property settings. On this Property Settings page, click on the Move to Trash Can button on top right, then click Move to Trash button on the Move Property to Trash Can page.
If the Universal Analytics property is linked or associated with the new Google Analytics 4 property, you won’t be able to delete the Universal Analytics property.
In such case, you can follow these steps to unlink a Universal Analytics property from a Google Analytics 4 property.
Navigate to admin >> property. In this Property column, select the classic Universal Analytics property you want to remove. You will then find the GA4 Setup Assistant option beneath. Click on it to open the Google Analytics 4 Property Setup Assistant page.
Here you can find that you have connected your GA4 property and the class UA property. There will be a Connected Property section where you can disconnect your properties at any time by clicking the Disconnect button.
After that you will get a warning or confirmation dialog.
Are you sure you want to disconnect your properties?
By disconnecting your properties:
You’ll need to manually update your Google Analytics 4 property configurations.
You may need to remove a connected site tag if you want to stop sending site data to the connected Google Analytics 4 property.
To take advantage of future Google Analytics 4 upgrade tools, you’ll need to reconnect.
If you have made up your mind to get rid of the old classic Google analytics, click Continue button to complete.