Learn Relational Databases by Building a Mario Database - Build a Mario Database

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Estoy teniendo problemas de errores que no me dejan avanzar, he reiniciado el ejercicio por completo pero sigue dandome errores por los que no puedo continuar.
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Challenge: Learn Relational Databases by Building a Mario Database - Build a Mario Database

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Me sale un aviso como si no estuviera ‘logeada’ en postgresql,

you are already connected to the database, you should not try to connect to the database again there

The Relational Database certification is in beta and is not stable.
When you have issues you can try to read and follow this post: