modification of interface also copy arp!

RouterOS Scripting
1

Hello! I want to achieve with modification of interface also copy arp! Excuse me such a script to write?

:foreach i in [/ip arp find interface=lan ] do={/ip arp add copy-from $i}

I want to copy and modify with " interface=lan2"

thk

2 
:local a
:foreach i in [/ip arp find interface=lan] do={
  :set a [/ip arp get $i address]
  /ip arp add address=$a interface=$i
}