I am using kdenlive version 19.04.3 on Manjaro 18.0.4

I have been able to generate multiple MLT files to be processed in batch.
After an initial MLT file is created by the Generate Script function for a new project, performing a new Rendering To Script to fine-tune video quality, etc., DOES NOT OVERWRITE the previously generated MLT file in kdenlive-renderqueue.
Please advise. Thx

can you open an "issue" about this? maybe with some screenshots of permissions of files and location of files (PNG format) just to have a feedback from other users to be sure this is not (only) related to your Linux-installation/file-permissions (but i think this can be a real issue because the MLT generated file can be IN USE when trying to replace it)

https://invent.kde.org/kde/kdenlive/issues (thanks for your time)