Changing path doesn't change file/folders to reflect new path

[stevemarksd]

Describe the bug
If you look at my config below I have

        path: '{{path}}/{{path}}'
        preview_path: '{{path}}'

So it saves the article this way:

• slug
  • slug.md
  • images.jpg

To Reproduce

Add my settings.

Then create a new post. path: slug1

• slug1
  • slug1.md
  • images.jpg

Change path to slug 2

File and folder is still named under previous name.

• slug1
  • slug1.md
  • images.jpg

Expected behavior

• slug2
  • slug2.md
  • images.jpg

Also branch name is still slug1 instead of slug2

Screenshots

Applicable Versions:

• Netlify CMS version: "netlify-cms-app": "2.13.1",
• Git provider: gitlab (AWS lightsail bitnami)

CMS configuration

# https://www.netlifycms.org/docs/gitlab-backend/
backend:
  name: gitlab
  repo: root/site.com
  branch: master
  api_root: https://mygitlab.com/api/v4
  base_url: https://mygitlab.com/
  auth_type: implicit
  app_id: 222
  auth_endpoint: oauth/authorize
# Where to save image
media_folder: src/content/images/cms
# Prefix image url (gatsby-remark-relative-images staticFolderName + media_folder = image)
public_folder: /images/cms
publish_mode: editorial_workflow
collections:
  - name: default
    label: Default
    folder: src/content/pages
    create: true
    media_folder: ''
    public_folder: ''
    path: '{{path}}/{{path}}'
    preview_path: '{{path}}'
    fields:
      - { name: path, label: Path, widget: 'string' }
      - { name: createdAt, label: Created Date, widget: 'datetime' }
      - { name: updatedAt, label: Last Updated Date, widget: 'datetime' }
      - { name: title, label: Title, widget: 'string' }
      - { name: description, label: Description, widget: 'string' }
      - { name: keywords, label: Keywords, widget: 'string' }
      - { name: tags, label: Tags, widget: 'list' }
      - { name: featuredImage, label: Featured Image, widget: 'image' }
      - { name: content, label: Show on home page, widget: 'boolean', default: true }
      - { name: body, label: Body, widget: 'markdown' }

Note the path: '{{path}}/{{path}}'. This will create pr with the name /slug1/slug1/, maybe having that slash breaks? but sometimes works... so should be something else.

Additional context

[erezrokah]

Hi @stevemarksd, this is intended as changing the file path will most likely break existing published URLs in static site generators.

This is discussed in #445. Closing this issue in favour of #445