Seeing the error:
Failed to save profile because the mobile phone number is already in use by another user. Try again after updating the profile.
This means the mobile number you entered is already in use.
The number is associated with another PerfDog account. Please:
Sign in: If you have an existing PerfDog account with this mobile number, please sign in to access it.
The account could have been registered with another email address.
The account could have been set up by an event secretary on your behalf.
Update mobile number: If you're using a different account, please update your mobile number to a unique one."