OpenID double client authentication

Hi - I’m currently using Keycloak for accessing a dashboards of applications. When authenticated, I pick up an app and login using SSO. And I must re-authenticate again on Keycloak.
Both auth have the same Client, When I connect for the first time, I see the my session. When I authenticate using SSO, I didn’t see a second session nor an override of the actual session. I’m using openID, can someone tell me how to setup my client to make the authentication only one time (I mean when I click sso, it see that I’m already authenticated)?

Thanks.