What do these Cisco iOS warning messages mean?

I have tried googling but found nothing.

#WARNING: column Hw. Offload collides with Hw. Offload WARNING: column Packet Type collides with Packet Type WARNING: column ARP Src. MAC Address/Src. MAC Address collides with Src. MAC Address/Src. MAC Address WARNING: column ARP Src. MAC Address/Src. MAC Mask collides with Src. MAC Address/Src. MAC Mask WARNING: column ARP Dst. MAC Address/Dst. MAC Address collides with Dst. MAC Address/Dst. MAC Address WARNING: column ARP Dst. MAC Address/Dst. MAC Mask collides with Dst. MAC Address/Dst. MAC Mask WARNING: column Packet Mark collides with Packet Mark WARNING: column To MAC Address collides with To MAC Address WARNING: column Packet Type collides with Packet Type WARNING: column ARP Src. MAC Address/Src. MAC Address collides with Src. MAC Address/Src. MAC Address WARNING: column ARP Src. MAC Address/Src. MAC Mask collides with Src. MAC Address/Src. MAC Mask WARNING: column ARP Dst. MAC Address/Dst. MAC Address collides with Dst. MAC Address/Dst. MAC Address WARNING: column ARP Dst. MAC Address/Dst. MAC Mask collides with Dst. MAC Address/Dst. MAC Mask WARNING: column Packet Mark collides with Packet Mark WARNING: column To MAC Address collides with To MAC Address 

Those messages appeared after I put a VLAN on a neighbouring Mikrotik, and then I put a VLAN into that VLAN.