Pixhwak1 facing the problem of BDR_TYPE not inisialise

pixhawk 1 is facing the problem of the BRD_TYP initializing problem while pixhwak 2 is not facing the same problem.
let me know if anyone is also facing the same problem

Please set the BRD_TYP parameter to 2.
More info can be found here https://ardupilot.org/copter/docs/parameters.html#brd-type-board-type

A frequent cause for this seems to be loading a parameter file from a different board type. Make sure you haven’t done that, unless you really know what you’re doing.

so how i can rectify that…

Reset to defaults, compare the param files and only copy over ones you need to