Error updating to ODK Central 1.5

[Mauricio_Andres_Arci]

1. What is the issue? Please be detailed.
I am updating odk central 1.5 following the steps indicated in https://docs.getodk.org/central-upgrade/, however once I execute the command 'docker-compose update-d' I get the message shown in the image below

2. What steps can we take to reproduce this issue?

3. What have you tried to fix the issue?
Run first 'docker-compose stop' and then 'docker-compose build'.

I would appreciate if you could help me to solve this problem, or give me a guide to go back to version 1.4.

[Mauricio_Andres_Arci]

The problem was that I had left a dkim setup process incomplete, in which I needed to first remove my old mail container (docker-compose rm mail). After this everything worked normally.