So you need to update your connection to your Google My Business account, it's easy, just follow the steps below;

1. Make sure the website you want to update is active in your account
2. Select the cog (website settings) button;

3. Scroll down the website settings page to the Connected Accounts section, here you will see the ID of the account you have connected for Google My Business;

4. Click on (Disconnect) 

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