Growing disk space - strange folders in /backup

Hi!
I know this theme about disk space has been discused before. While inspecting folder on my HA OS installation (proxmox VM), I stumbled upon some files and folders under /backup directory.

And except for some files which can be identified through HA backup menu via GUI, I’m not sure if I can delete them. Specifically tmp folders /backup/tmpv40_wbb4 and /backup/tmpep5exy4d

I’m pasting some screens of contents of /backup folder below if someone can can tell me if deleting files from 2023 is safe. And also why these temp folder are not deleted automaticly?

Thank you all in advance!