Error: Unable to 'pub upgrade' flutter tool. Retrying in five seconds… Error on line 14, column 6 of pubspec.yaml: Expected ':'

Someone on stackoverflow posted about this issue before and there isn’t an answer to this issue.

The issue:

Error on line 14, column 6 of pubspec.yaml: Expected ':'.
   ╷
14 │   dds: 2.7.10
   │      ^
   ╵

I tried everything that was suggested in this post: Error: Unable to 'pub upgrade' flutter tool

>>> flutter pub get
>>> flutter clean
>>> flutter run
>>> flutter pub cache repair
>>> flutter doctor
>>> flutter upgrade

All this didn’t work, still jump to this error.

If anyone knows how to solve this issue, please answer or add a comment on this question, thanks.

here is my pubspec.yaml file:

name: mytable
description: A new Flutter project.
# The following line prevents the package from being accidentally published to
# pub.dev using `flutter pub publish`. This is preferred for private packages.
publish_to: 'none' # Remove this line if you wish to publish to pub.dev

# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# In Android, build-name is used as versionName while build-number used as versionCode.
# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
# In iOS, build-name is used as CFBundleShortVersionString while build-number is used as CFBundleVersion.
# Read more about iOS versioning at
# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
# In Windows, build-name is used as the major, minor, and patch parts
# of the product and file versions while build-number is used as the build suffix.
version: 1.0.0+1

environment:
  sdk: '>=3.0.5 <4.0.0'

# Dependencies specify other packages that your package needs in order to work.
# To automatically upgrade your package dependencies to the latest versions
# consider running `flutter pub upgrade --major-versions`. Alternatively,
# dependencies can be manually updated by changing the version numbers below to
# the latest version available on pub.dev. To see which dependencies have newer
# versions available, run `flutter pub outdated`.
dependencies:
  cupertino_icons: ^1.0.2
  flutter:
    sdk: flutter
  flutter_screenutil: ^5.8.4
  flutter_svg: ^2.0.7
  flutter_custom_clippers: ^2.1.0
  intl: ^0.18.1
  

dev_dependencies:

  # The "flutter_lints" package below contains a set of recommended lints to
  # encourage good coding practices. The lint set provided by the package is
  # activated in the `analysis_options.yaml` file located at the root of your
  # package. See that file for information about deactivating specific lint
  # # rules and activating additional ones.
  flutter_lints: ^2.0.0
  flutter_test:
    sdk: flutter

# For information on the generic Dart part of this file, see the
# following page: https://dart.dev/tools/pub/pubspec
# The following section is specific to Flutter packages.
flutter:

  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true
  # To add assets to your application, add an assets section, like this:
  assets: 
  - assets/images/
  
  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.dev/assets-and-images/#resolution-aware
  # For details regarding adding assets from package dependencies, see
  # https://flutter.dev/assets-and-images/#from-packages
  # To add custom fonts to your application, add a fonts section here,
  # in this "flutter" section. Each entry in this list should have a
  # "family" key with the font family name, and a "fonts" key with a
  # list giving the asset and other descriptors for the font. For
  # example:
  fonts:
    - family: Almarai-Bold
      fonts:
        - asset: assets/fonts/Almarai/Almarai-Bold.ttf

    - family: Almarai-Regular
      fonts:
        - asset: assets/fonts/Almarai/Almarai-Regular.ttf
     
    - family: Poppins-Medium
      fonts:
        - asset: assets/fonts/Poppins/Poppins-Medium.ttf

    - family: Amiri
      fonts: 
        - asset: assets/fonts/Amiri/Amiri-Bold.ttf
       
   
  #
  # For details regarding fonts from package dependencies,
  # see https://flutter.dev/custom-fonts/#from-packages