No space left on device, inodes exhausted

[supery-chen]

error: Can't create the symlink for multishells at "/run/user/0/fnm_multishells/250289_1747273940491". Maybe there are some issues with permissions for the directory? No space left on device (os error 28)

root@ci:~# df -h /run/user/0/
文件系统        大小  已用  可用 已用% 挂载点
tmpfs           1.6G   12K  1.6G    1% /run/user/0

root@ci:~# du -sh /run/user/0/fnm_multishells
0       /run/user/0/fnm_multishells

root@ci:~# ls -la /run/user/0/fnm_multishells | wc -l
405702

root@ci:~# df -i /run/user/0
文件系统       Inodes  已用I 可用I 已用I% 挂载点
tmpfs          405780 405780     0   100% /run/user/0

root@ci:~# which fnm && fnm --version
/root/.local/share/fnm/fnm
fnm 1.37.1

This error occurs periodically. Aside from manually removing the /run/user/0/fnm_multishells directory, are there any other solutions?