According to the docs, the Meltano

upgrade

command https://docs.meltano.com/reference/command-line-interface#upgrade applies migrations to the system database, but does not run relative to an environment. I have multiple environments with a remote Postgres system database for each. I also (basically) have a

.env

file per environment which declares all environment variables, including the

MELTANO_DATABASE_URI

system database connection string. Am I correct that if I’m updating my Meltano version, I need to run

meltano upgrade

for each environment? That is, I need to run it against each separate system database?

Yeah, you’d have to run migrations for each system db.