Hello @kindi-alfitrandy Instead of attaching the jpeg image file, may i request you to paste the image directly for better visibility. Btw, Converting an uplink port to a downlink port on a Cisco ACI leaf switch can sometimes lead to configuration mismatches, especially if there are existing policies or configurations applied to the interface. The error message "Configuration is mismatch with applied interface" indicates that there is a discrepancy between the desired configuration and the current state of the interface.
Let me know, if you would like me to share troubleshooting steps to resolve this issue.