'Can't start docker container with Keycloak 16, exited with code 1

I'm a newbie with docker, today I'm trying to start my docker container with keycloak without success, I haven't made any change to the container and it just doesn't want to start up. Here is the docker log error:

*** JBossAS process (188) received TERM signal ***
User with username 'admin' already added to '/opt/jboss/keycloak/standalone/configuration/keycloak-add-user.json'

The container is not inside any volume, and it was created using the command

docker run -p 8080:8080 -e KEYCLOAK_ADMIN=admin -e KEYCLOAK_ADMIN_PASSWORD=admin quay.io/keycloak/keycloak:16.1.0


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