I've been trying to get my echo dot to work I did it wrong the first time so am trying to do it again but it keeps saying its a duplicate account

Open the Alexa website, at https://alexa.amazon.com/, and sign in with your Amazon account. Select Settings, then, under Devices, select Set up a new device. Under Accessories, select Echo Connect and follow the on-screen instructions to complete setup.

Set Up Your Echo Connect - Amazon Customer Service

Amazon.com https://www.amazon.com > help > customer > display

Set Up Your Echo - Amazon Customer Service

Amazon.ca https://www.amazon.ca > help > customer > display
Set Up Your Echo · Plug in your device. · Open the Alexa app . · Open More and select Add Device. · Select Amazon Echo. · Select Echo, Echo Dot, Echo Plus and more.

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  Set Up Your Echo Dot - Amazon Customer Service

  https://www.amazon.ca > help > customer > display
  Plug in your Echo Dot device. On your mobile device, open the Alexa app . Open More and select Add a Device. Select Amazon Echo, and then Echo, Echo Dot, ...

English only please on this North American website please.

You can just ASK Alexa! Change the Time Format on Your Echo Dot with clock. Say "Change to 24-Hour clock".

Use the Alexa app to change the time format on your device.

1. Open the Alexa app .
2. Select Devices .
3. Go to Echo & Alexa, or to All Devices.
4. Select your Echo Dot with clock device. This opens device settings.
5. Under General, select LED Display.
6. Turn 24-Hour Clock on or off.

Change the Time Format on Your Echo Dot with clock

Hopefully, you would be ready to solve Amazon Echo Alexa Setup trouble on your own. Are you? Amazing, let's without burning our time, simply look towards the steps recommended below.

Install The Alexa App

To begin the Alexa setup first thing you need to do is to install the Alexa app. To not cause any trouble while installing the app you have to ensure the Internet connection with your device should be strong enough.

When it gets installed you have to sign in yourself. If you haven't created an account there then first create the account. Kindly enter the correct password.

Add The Device

It's time to add your device to the Alexa app. Kindly properly follow the on-screen instructions, it is very important to be followed nicely.

Plug-in The Echo Dot

Connect the power cord to the Echo and wait for the Echo to turn on. If the light is flashing on the device then don't be worried, this happens, it is a part of Echo Setup on Echo Dot device.

Connect With The Wi-Fi

You have to connect your Echo with a strong Internet network. The Internet should be stable and reliable.

Note Some Points:

• Keep your router at a distance of 4 to 5 feet.
• Do not place it near any electronic gadgets.
• It should be 6 feet above ground level.
• If there would be any objects in between your device ten remove them as soon as it is possible.

We wish that you will succeed to do Set Up Alexa on Echo Dot with the help of the steps shared in this article.

try renaming the room of your lights and make sure both echos are synced up to one account otherwise it may make both of them confused on how to control the lighting in your home

hi roger.
see if this helps you out.

1. Turn on Echo Dot. Place your Echo Dot in a central location (at least eight inches from any walls and windows). ...
2. Connect Echo Dot to a Wi-Fi network. In the Alexa app, follow the instructions to connect Echo Dot to a Wi-Fi network. ...
3. Talk to Alexa. ...
4. Optional: Connect Echo Dot to an External Speaker.

Amazon.com Help: Set Up Your Echo Dot

https://www.amazon.com/gp/help/customer/display.html?nodeId=201994280
or if you need more help go to this link.
Setting up echo dot Google Search

It means your device is locked from registration by Amazon. Either it's considered stolen or a return in transit. You will need to call amazon customer service and have then connect to echo team. That's how I had it resolved. I had a return that I decided to keep - but when initially requested a return, it was deactivated by them.