Warning terrain clamping offset 13 to 10

Hi Folks,

I ve mounted my quad 7" and I want to use Ardu cause I m using it for my wings.
I ve had difficulties for my setup compare to Inav but I succeed.
Apart for the maiden, it has not happen as I would like. Take off and after 30 sec “Land mode”… And a message : “wrn terrain clamping offset 13 to 10”
I ve checked my params and terrain_ofs_max=10 , I ve changed it to 0 and the message desappears.

Please let me know what could it be this issue ?
Here is the log of this flight.
https://drive.google.com/file/d/1LFlWVSK20J3dnqdYu0RUZt21MiDb_j92/view?usp=sharing

Thanks a lot

A Tlog isn’t that useful.