Data lost when the wiki name is truncated.

[VimWei]

I creat a wiki page with vimwiki, and there is a : in the name such as 20240322foo10:00bar.md.
Vimwiki can create, edit and save this page. And this page can be reopened with the same name after closing Vim.
However, I found that the page file is actually saved as short name 20240322foo10 on the disk and the file size is 0.

And undotree work fine with the full name 20240322foo10%00bar.md.

Because I discovered the problem later, I deleted those zero-size files. Fortunately, I have backups of these files. However, when I put the backup files back and Vimwiki opens them with the original full names, the content is blank, and I can't use undotree either.

Is there any way to restore the files in this situation?

ref：mbbill/undotree#116 (comment)