Watchdog reboot issue

hello
I’m building a 1S battery powered drone and flight controller.
The motor uses a brushed motor.
I am using STM32F427 and no coprocessor.
My parameter settings are MOT_PWM_TYPE = 3 = Brushed, RC_SPEED = 16000.
I arm myself through the remote controller, but my flight controller reboots and outputs the following message through Mission Planner.
Does anyone know anything about this issue?