Why Check_MK service showing status details as null?

I am using Check_MK version 1.2.0p2.

On Check_MK UI I am getting (null ) as a status details for service Check_MK.

Here is the image for more clarification. enter image description here

Solution

just remove the precompiled check for that hosts, then "check_mk -II " and then "check_mk -R". That did it for me! (I am using OMD)