Deleting a phone number on echo-to-echo calling

[restamp]

When people try to make an echo-to-echo call to me, their device always asks  "Which John Doe, the one whose phone number ends in xxxx or the one whose phone number ends in yyyy?"  The first is my landline number, which I suspect it picked up from my Amazon Web Services account, although I'm not absolutely sure.  The second is the number I gave it for verification when setting up echo calling.  Both seem to resolve to me.

Is there an easy way to tell my echo account to ignore the first number and only register the second for echo calling?