CubeBlack only got 256KB RAM, I noticed under 4.3.8 it becomes very warm compared to the earlier firmware version. so, I have since migrated to CubeBlueH7 or Orange.
By the way, it is on the first or second flight based on this configurator sequence as @amilcarlucas mentioned.
have you calibrated the ESC? Your Motor minimum looks unusual in my experience.
Have you set the MOT_SPIN_ARM and MIN wrongly from the Motor Test UI? I think you need to find out your ESC/Motor MOT_PWM_MAX and MIN. I think Skywalker is 1100 - 1940 us / 1960, cannot remember. Maybe enable this LOG_FILE_DSRMROT,1.
I am also curious whether you will hit the underweight issue running at a low motor percent curve. 17" prop → (2.806kg x 6 / 2.4) = 7.015kg.
This is mine.