Versa 2 lost connection and is locked

[SunsetRunner]

I changed my wrist band and my Fitbit lost connection and is locked .

I tried to reset but it asks for a four digit number that I can’t receive because the Fitbit is locked 

Moderator edit: subject for clarity 

[LiliyaFitbit]

Welcome to the Fitbit Community, @SunsetRunner.

I appreciate your participation in the Forums and sharing that your Versa 2 lost connection and is locked. Thanks for trying to resolve this, I am here to help. I recommend to factory reset the watch. Take note that this will wipe all unsynced data and user-installed apps on the watch. Please follow these steps:

1. Hold the back (left) button for about 8 seconds. 
2. When the Fitbit logo disappears:
1. Release the button briefly (for less than 2 seconds). 
2. Hold the button again until you feel a second, longer vibration, which indicates that you have initiated the factory reset. 

Once done, follow the steps to setup your Versa 2: How do I set up a replacement device or add a second device to my account?

For more information about the device lock, see How do I use the device lock on my Fitbit device?

Let me know how it goes.