SONiC supports Vlan interface names in format "Vlan"+dot1Q tag.
So, usually SONiC vlan names are: Vlan1 (for vlan tag 1), Vlan10 (for vlan tag 10) and so on.
Currently sonic-cfg takes a Vlan interface names from the minigraph VlanInterface["Name"] field. But it can contains a vlan name in incompatible format, like "Computers".
So right way to create a vlan name is to use "Vlan" + VlanInterface['Tag"].