Wordpress 2nd installation fails

Hi: I’m trying to install a second instance of Wordpress but it fails giving the message in the history:

Back-off restarting failed container wordpress-ast in pod wordpress-ast-5694bdc7d4-m7vxt_ix-wordpress-ast(cca7b615-25da-484e-89fa-d70efb2d9134)

I think it might be related to mariadb. Would anyone have an idea what might be the problem?