Can'not config ipv6 mld snooping querier at VDX6740 (VxRail B series Switch config)

Hello,

I'm using the vdx6740 at VxRail ToR Switch.Firmware is 6.0.1a version.

but I has been set in the VDX best practices, it can not set "ipv6 mld snooping querier enable"configuration of Vlan1.

I can not be understand.

Error is following.

> Error(s):

> vlan 1: %% Error: Configuration not allowed as vlan is a private-vlan

I have Other vdx6740 switches ,it can set ipv6 snooping querier enable settings for same firmware.

What is the problem?

--running-config--

interface Vlan 1

ip igmp snooping enable

ip igmp snooping querier enable

ipv6 mld snooping enable