GYRO noise increase when multiple chips was inited

By 1216052941qqcom , 23 April 2022

I am using ICM-42688-P.I was asked to put 8 chips on 1 board, and I found every GYRO noise lower than 170Hz increase when other chips was inited.More chips, greater the noise.
GYRO_ODR is 2kHz,GYRO_UI_FILT_BW is 400Hz,GYRO_NF_DIS off,GYRO_AAF_DIS 170Hz.
I have no idea how to avoid noise increase.May somebody help me?
There are pictures which show the frequency characteristic of noise.

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