Meltano

*State Backend - External Postgres*
Hi all,
I'm using the docker version of Meltano 2.17.0
I've been playing with the state and trying to set this up on an external postgres db, using the commands below:

`docker run  -v $(pwd):/project -w /project meltano/meltano config meltano set state_backend.uri <postgresql://user:pass@server12345.aws.com:5432/dbtest?options=-csearch_path%3Dmelty>`

`docker run  -v $(pwd):/project -w /project meltano/meltano config meltano set database_uri <postgresql://user:pass@server12345.aws.com:5432/dbtest?options=-csearch_path%3Dmelty>`

I did this in a previous version and could make it work. Now when i try
to run the pipeline i'm getting the following error message:

*`Cannot start plugin tap-mysql: 'postgresql' is not a valid StateBackend`*

Any idea of what could be the issue here?

Ok, the funny thing is that it is writing these error messages in postgres, in the runs table, meaning that the `database_uri` parameter seems to be ok, but the `state_backend.uri` it's not.

I made it work by setting the `database_uri` with the postgres connection and `state_backend.uri to 'systemdb'`