Static IP changed but retains old address

Troubleshooting
3

Nothing. thanks.

dietpi@DietPi:~$ ls -la /etc/network/interfaces.d/
total 8
drwxr-xr-x 2 root root 4096 Nov  4  2020 .
drwxr-xr-x 7 root root 4096 Dec  6 23:41 ..