I renamed a big folder that contains a lot of files I recently edited.
After changing the name, my neovim's `v:oldfiles` list contains the old names that is no longer accessible. How can I clean the list or fix the list to reflect the renaming. 

I use `fzf` to access the mru files.
I tried to set the variable directly but it doesn't work

---------

I followed the selected answer to solve the problem for `neovim`. But when I write the file, even without any change and directly do `:w`, I encounter the following error and have no idea how to solve it.

    Error detected while processing function 
    shada#get_binstrings[1]..shada#strings_to_sd[9]..
    <SNR>184_shada_convert_strings[87]..
    <SNR>184_shada_eval[1]..msgpack#eval:
    line   65: 
    E716: Key not present in Dictionary: "py
    E116: Invalid arguments for function add
    Error detected while processing BufWriteCmd Auto commands for "*.shada": 
    E686: Argument of writefile() must be a List

-----------
**Update** The error is reported to [neovim](https://github.com/neovim/neovim/issues/8956). 

A possible fix is to change line 609 of `runtime/autoload/msgpack.vim` from

    elseif s =~# '-\?\%(inf\|nan\)'

to

    elseif s =~# '^-\?\(inf\|nan\)$'

The code affects all versions of neovim.