How can I run multirun without merging the .lhe files at the end of the process?

I'm working with multirun and have several .lhe files that I want to process separately. However, at the end of the execution, the mg5 system automatically merges the output files, which takes a lot of time, and I prefer to read each .lhe file individually. Is there a way to configure multirun so it doesn’t merge the files and keeps them separate?

Here an example of my script

import model sm
generate p p > ta+ ta-{L} @0
output /home/cfrc/github/ditaus_analysis/outputs/sm_lh_ditaus -nojpeg

launch /home/cfrc/github/ditaus_analysis/outputs/sm_lh_ditaus -i
multi_run 20 --nb_core=30
shower=Pythia8
detector=Delphes
analysis=OFF
set nevents 50000
set pt_min_pdg {15:10}
set eta_max_pdg {15:5}
set sde_strategy 1
set ebeam1 6800
set ebeam2 6800
done

exit

Any suggestions or parameters I can modify to achieve this would be greatly appreciated.