Re-running a simulation from a ParamSpace meta config fails

When trying to utopia run MyModel path/to/some/older/meta_cfg.yml, this fails with a stupid error.

Steps to reproduce

1. Perform a run
2. Use the created meta_cfg.yml as input for another run of the same model

What is the current bug behaviour?

Fails when trying to iterate parameter_space entry, assuming it is not a ParamSpace object.

What is the expected correct behaviour?

Succeeds.

Ideas how to fix this?

Distinguish between dicts and ParamSpace objects for parameter_space key of the meta config.