Do I need a 'vbmeta' partition to install GSI?

Following the official GSI installation instructions from [Google](https://source.android.com/setup/build/gsi#flashing-gsis) , they say to run fastboot --disable-verification flash vbmeta vbmeta.img. When I run that, I get the following message:

Rewriting vbmeta struct at offset: 0
Sending 'vbmeta' (4 KB)                            OKAY [  0.010s]
Writing 'vbmeta'                                   FAILED (remote: 'This partition doesn't exist')
fastboot: error: Command failed

Does this mean dm-verity is not in use, and I can ignore this message? Do I need to make a partition? How do I do that? Right now the GSI image is not booting for me. I am flashing onto the Blackview BV5500 Pro, if it matters.