Org babel R sessions setwd value

If I make a new org file:

#+begin_src R getwd() #+end_src #+begin_src R :session getwd() #+end_src 

If I set the value for this org file then if I close the file and close emacs and reopen it still does not ask me for it again it just remembers what I entered last time. I want to change this value for an existing org file I do not know how to do this other then making a new org file and answering the question differntly.

info:

GNU Emacs 29.3 (build 1, aarch64-apple-darwin21.6.0, NS appkit-2113.60 Version 12.6.6 (Build 21G646)) of 2024-03-24

On Mac os

It might be something to do with Git and ESS?

I tried to trace (following chatgpt instrucions):

org-babel-execute-src-block:

Run M-x debug-on-entry RET org-babel-execute-src-block RET.

I then saw:

* ess--project-root((vc Git "~/Documents/sc_pd_ras_dop/")) 

Which is the dir that it is defaulting to, by inserting :

setwd('~/Documents/sc_pd_ras_dop') 

In the R buffer.

I think these variables might also be relevant?

If I open my org file which does not ask for the dir and try and describe the vars I get:

ess-ask-for-ess-directory nil
ess-startup-directory t

UPDATE

I think I was mistaken above. The issue I am having with sessions seems to do with setting a dir in the src code block.

if I have:

#+begin_src R :session new getwd() #+end_src 

I get prompted for my R starting project directory

if I have:

#+begin_src R :session new :dir "~" getwd() #+end_src #+RESULTS: : /Users/myusername 

Which is my home dir

but if I have:

#+begin_src R :session new :dir "." getwd() #+end_src #+RESULTS: : /Users/myusername/Documents/myproject 

Which is maybe the project dir that ess is getting because of git? my org file is located in

/Users/myusername/Documents/myproject/scripts/org 

so I think it is defaulting to the project-dir from ess.

if I have

#+begin_src R :session new :dir "./scripts" getwd() #+end_src #+RESULTS: : /Users/myusername/Documents/myproject 

and if i have

#+begin_src R :session new :dir "scripts" getwd() #+end_src #+RESULTS: : /Users/myusername/Documents/myproject 

But If i have

#+begin_src R :dir . getwd() #+end_src #+RESULTS: : /Users/myusername/Documents/myproject/scripts/org 

That is without a session it seems to do what I expect