Vbmeta Disableverification Command 2021 ^new^
fastboot flash vbmeta --disable-verification vbmeta.img In some older or device-specific implementations (especially on MediaTek or older Qualcomm devices in 2021), you might see:
fastboot flash vbmeta --disable-verity --disable-verification vbmeta.img vbmeta disableverification command 2021
fastboot -w Failing to wipe data after disabling verification often results in a bootloop due to encrypted userdata mismatches. fastboot flash vbmeta --disable-verification vbmeta