Error on one repository : worktree contains unstaged changes

**Describe the bug**
When I try to apply a "command" to a list of reporitories it works perfectly on all of them except for one that return the error in attached.

`Error="worktree contains unstaged changes"`

**To Reproduce**

I can't reproduce it manually, I try to clone the project and checkout a new branch with this command `git checkout -b "core/update"` but I can't reproduce the error "manually".

**Expected behavior**

Normal behavior, so checkout and apply the command.