Full inode space on root partition

Receiving this error when trying to log into WHM:

Code:

[SIZE=6][B]Internal Server Error[/B][/SIZE]
500

The system failed to open the session file “/var/cpanel/sessions/raw/:pb8d7W30KaqvcXPi” because of an error:  at /usr/local/cpanel/Cpanel/Session.pm line 277.
cpsrvd/11.54.0.18 Server at serverxx.com

It appears that your root partition has all of it's inodes used, please see below:

Code:

[|91.xx.105.9] Alerts:
[7488237] [/root]$ df -ih
Filesystem Inodes IUsed IFree IUse% Mounted on
rootfs 5.5M 5.5M 0 100% /
/dev/root 5.5M 5.5M 0 100% /
devtmpfs 2.0M 2.4K 2.0M 1% /dev
/dev/md3 111M 6.5M 105M 6% /home
tmpfs 2.0M 1 2.0M 1% /dev/shm
/dev/loop1 157K 287 156K 1% /tmp
/dev/loop1 157K 287 156K 1% /var/tmp

i tried to use this solutions : No space left on device

but i can't create new file in Root partition

Please can you help me how can i resolve this issue

Thank you

 

Thank you Michael for your answer,
I tried this, the command has been executed, but nothing changed.