when tried to build image using command bitbake -k wac-core-image below error poped up.

ERROR:  OE-core's config sanity checker detected a potential misconfiguration.
    Either fix the cause of this error or at your own risk disable the checker (see sanity.conf).
    Following is the list of potential problems / advisories:

    TUNE_ARCH is unset. Please ensure your MACHINE configuration includes a valid tune configuration file which will set this correctly.
Error, the PACKAGE_ARCHS variable (all any noarch ${PACKAGE_EXTRA_ARCHS:tune-${DEFAULTTUNE}} wacin) for DEFAULTTUNE (None) does not contain TUNE_PKGARCH ().Toolchain tunings invalid:
No tuning found for default multilib.

I am upgrading from dunfell to scarthgap-5.0.5 (LTS), were dunfell had no TUNE_ARCH (tune-coretexA72.inc) but scarthgap has it. 
or is it a good practice to disable the checker? Location for tune-coretexA72.inc should be /conf/machine/ ?