Settings generated from `plams.AMSMDJob.restart_from` cannot pickle

[GiulioIlBen]

In: https://github.com/SCM-NV/PLAMS/blob/trunk/src/scm/plams/recipes/md/amsmdjob.py

    @staticmethod
    def _get_restart_job_velocities_molecule(other_job, frame=None, settings=None, get_velocities_molecule=True):
        """
        other_job: str or some AMSMdJob

        get_velocities_molecule : bool
            Whether to get the velocities and molecule right now. Set to False to not access other_job.results (for use with MultiJob prerun() methods)

        Returns: (other_job [AMSJob], velocities, molecule, extra_settings [Settings])
        """
        if isinstance(other_job, str):
            other_job = AMSJob.load_external(other_job)
        if get_velocities_molecule:
            if frame:
                velocities = (other_job.results.rkfpath(), frame)
                molecule = other_job.results.get_history_molecule(frame)
            else:
                velocities = other_job
                molecule = other_job.results.get_main_molecule()

velocities = other_job means that velocities can be a plams.AMSJob object so if you do a copy.deepcopy of the settings it results:

TypeError: cannot pickle '_thread.lock' object

can we change it to velocities = other_job.results.rkfpath()?