High Z-Axis Vibration?! what is the cause?

Hi there,
please I have a problem with the Z-axis Vibration, it’s very high which makes a problem in altitude hold.
although I am using dampers under the FC.
i am using dji F450 with Pixhawk 4
This is the log file file
https://logs.px4.io/plot_app?log=184f122d-eda2-4559-8dff-905d7e238d22
please any suggestions, i am already using damper this one
c283fe0e68c6157003202c1832922689e8cf3903
thanks in advance