Cannot open Android studio 4.2 Canary 8 or 9 after having installed Canary 7

When launching directly [...]/Android Studio 4.2 Preview.app/Contents/MacOs/studio I have the following output :

2020-09-03 14:09:02.078 studio[4589:59392] allVms required 1.8*,1.8+
2020-09-03 14:09:02.078 studio[4589:59392] Can't find bundled java.The folder doesn't exist: /Applications/Android Studio 4.2 Preview.app/Contents/jbr
2020-09-03 14:09:02.078 studio[4589:59392] Can't find bundled java.The folder doesn't exist: /Applications/Android Studio 4.2 Preview.app/Contents/jdk
2020-09-03 14:09:02.082 studio[4589:59397] WorkingDirectory is absent in Info.plist. Current Directory: /Applications
2020-09-03 14:09:02.082 studio[4589:59397] fullFileName is: /Applications/Android Studio 4.2 Preview.app/Contents/bin/studio.vmoptions
2020-09-03 14:09:02.082 studio[4589:59397] fullFileName exists: /Applications/Android Studio 4.2 Preview.app/Contents/bin/studio.vmoptions
2020-09-03 14:09:02.083 studio[4589:59397] Value of STUDIO_VM_OPTIONS is (null)
2020-09-03 14:09:02.083 studio[4589:59397] Processing VMOptions file at /Applications/Android Studio 4.2 Preview.app/Contents/bin/studio.vmoptions
2020-09-03 14:09:02.083 studio[4589:59397] Done
2020-09-03 14:09:02.083 studio[4589:59397] Processing VMOptions file at /Users/myUser/Library/Application Support/Google/AndroidStudioPreview4.2/studio.vmoptions
2020-09-03 14:09:02.083 studio[4589:59397] Done
2020-09-03 14:09:02.083 studio[4589:59397] Processing VMOptions file at
2020-09-03 14:09:02.084 studio[4589:59397] No content found
OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
Error occurred during initialization of VM
Multiple garbage collectors selected

The line i want to highlight here is

2020-09-03 14:09:02.083 studio[4589:59397] Processing VMOptions file at /Users/myUser/Library/Application Support/Google/AndroidStudioPreview4.2/studio.vmoptions

After having removed that file, the new version of canary can be opened !

I guess there is something wrong in this file that prevents the migration

In my case, I've isolated a couple of studio.vmoptions values that, if left in, prevent any version >= Android Studio 4.2 canary 8 to launch.

-XX:+UseConcMarkSweepGC
-XX:CMSInitiatingOccupancyFraction=85
-XX:+UseCMSInitiatingOccupancyOnly
-Xloggc:gc.log

If I remove all of them, it opens as normal. If I leave any of them, it won't open.