Not an issue, just a question about “ conf_now->foc_observer_offset” =-1

[pengjie012]

		{
			if (!motor_now->m_phase_override) {
				foc_observer_update(motor_now->m_motor_state.v_alpha, motor_now->m_motor_state.v_beta,
						motor_now->m_motor_state.i_alpha, motor_now->m_motor_state.i_beta,
						dt, &(motor_now->m_observer_state), &motor_now->m_phase_now_observer, motor_now);

				// Compensate from the phase lag caused by the switching frequency. This is important for motors
				// that run on high ERPM compared to the switching frequency.
				motor_now->m_phase_now_observer += motor_now->m_pll_speed * dt * (0.5 + conf_now->foc_observer_offset);
				utils_norm_angle_rad((float*)&motor_now->m_phase_now_observer);
			}

Why is the value of conf_now->foc_observer_offset = -1? I’m a beginner and don’t quite understand this. Thank you.