Unknown error

Hi bro.

I'm configuring for an EX3300 switch, and I get this error

error: Overlapping subnet is configred under vlan
[edit interfaces vlan unit 211 family inet]
'address 172.29.5.4/27'
Overlapping subnet is configured
error: configuration check-out failed

I'm sure about that, there is no more any L3 interfaces on this switch, even I delete all, and reconfigure, but the error is same. Anybody can tell me what is error ?

root@BR-CTO-SW-ACC-02# show interfaces
xe-0/1/1 {
unit 0 {
family ethernet-switching {
port-mode trunk;
}
}
}
vlan {
unit 211 {
family inet {
address 172.29.5.4/27 {
preferred;
}
}
}
}

You can see, I only have this interface vlan.211.