/interface vlan
add arp=reply-only interface="LAN (sfp-sfpplus2)" name="lab_6 (24)" vlan-id=24
/ip dhcp-server
add add-arp=yes authoritative=after-2sec-delay interface="lab_6 (24)" \
    lease-time=3d name=lab_6
/ip dhcp-server network
add address=10.1.24.0/23 dns-server=10.1.100.101,10.1.100.102,10.1.24.254 \
    gateway=10.1.24.254 netmask=23 wins-server=10.1.100.102
/ip dhcp-server lease
add address=10.1.25.8 comment="igroove - L33-PC08" mac-address=\
    xx:xx:xx:xx:xx:xx server=lab_6

:local arplist [/ip arp find where disabled =no]
:foreach i in=$arplist do={
  if ([/ip arp get $i address] = $address) do={
/ip arp disable $i
/ip arp enable $i
}
}

updated below

/ip hotspot user profile set [find] on-login="Fix_arp_schedule"


/system script add dont-require-permissions=no name=Fix_arp owner=admin policy=\
    ftp,reboot,read,write,policy,test,password,sniff,sensitive,romon source=":lo\
    cal darplist [/ip arp find where invalid=yes and dynamic=yes]\r\
    \nif ( [:len \$darplist] > 0 ) do={ \r\
    \n:log info [:len \$darplist]\r\
    \n:local dlist [/ip dhcp-server find where add-arp=yes and disabled=no]; \r\
    \n/ip dhcp-server set \$dlist add-arp=no; \r\
    \n/ip dhcp-server set \$dlist add-arp=yes; }\r\
    \n\r\
    \n\r\
    \n:local sarplist [/ip arp find where invalid=yes and dynamic=no and disable\
    d=no]\r\
    \nif ( [:len \$sarplist] > 0 ) do={ \r\
    \n/ip arp disable \$sarplist;\r\
    \n/ip arp enable \$sarplist;\r\
    \n}"

/system script add dont-require-permissions=no name=Fix_arp_schedule owner=admin policy=\
    ftp,reboot,read,write,policy,test,password,sniff,sensitive,romon source="/\
    system scheduler add name=Fix_arp interval=00:00:01 on-event=\"/system sch\
    eduler remove Fix_arp;/system script run Fix_arp;\""
    
/system scheduler add disabled=no interval=5s name=FixArp on-event=Fix_arp policy=\
    ftp,reboot,read,write,policy,test,password,sniff,sensitive,romon