Good hind above and I don´t know another way .
What I do before mixing a song after all recordings
and composing aso is done is :
Bouncing or freezing all midi trackss without fx so I that years later,
if perhaps there is no actual version (in a newer box) of a synth used in the project
available ,there is still the bounced version of this track and I can mix it with the same sound again.
This also saves CPU resources during the mixing stage.