A question about kernel compilation on Debian

Wed Apr 15 08:46:19 UTC 2020

I'm building linux-5.5.13 on a debian host with kernel version 4.19.0.
In the compilation process I got this error:
	make[1]: *** No rule to make target 'debian/certs/debian-uefi-certs.pem', needed by 'certs/x509_certificate_list'.  Stop.
In .config we have the line:
CONFIG_X509_CERTIFICATE_PARSER=y
This system is booting in bios legacy mode. If I change
CONFIG_X509_CERTIFICATE_PARSER=y
to n, will that render my system unbootable with this new kernel?