We implemented a notch filter for the 309 Hz line in the LOW_NOISE_1 state, as a last step with the switch of the coils' relays; in order to do that we added to the DARM loop the 'Arm_notch' filter, but disabling the already existing notch for a 16.85 Hz line, as it induced loop instability, but it was not used anyway. In addition, in order to use the additional filter we had to increase the maximal order of the 'LSC_NONE' filter placeholder from 80 to 100.