Type "show slot" and it shows state Mismatch, and type is different from configured.
show stacking
Stack Topology is a Daisy-Chain
This node is not in an Active Topology
Node MAC Address Slot Stack State Role Flags
---------------- ---- ----------- ----- -----
<MAC Address> - Active Master ---
<MAC Address> - Active None
show slot
Slots Type Configured State Ports
--------------------------------------------
Slot-1 X460-24t X460-24p Mismatch
Slot-2 X440-48t X440-48t Operational
* - Indicates this node
Flags: (C) Candidate for this active topology, (A) Active Node
(O) node may be in Other active topology