Note: Some guides suggest using both flags ( --disable-verity and --disable-verification ) to cover all bases, though the latter is the specific focus of this post.
fastboot --disable-verity --disable-verification flash vbmeta vbmeta.img --disable-verity
Modern rooting no longer modifies /system directly but instead patches the boot image. However, after rooting, dm-verity may detect changes to the kernel or system partitions. Disabling verification and verity prevents the bootloop that would otherwise occur.