Flutter Error on line 6, column 5 of pubspec.yaml: A dependency may only have one source. sdk: flutter ^^^^^^^^^^^^^

Consider you are going to use this package “shared_preferences”.

You will get this error in pubspec.yaml. If you did like below.

dependencies:
 flutter:
  sdk: flutter
  shared_preferences: v0.4.2

Indention is important you are accidentally adding shared_preference package below flutter dependency. So the error “A dependency may only have one source”

Correct format below:

dependencies:
 flutter:
  sdk: flutter

 shared_preferences: v0.4.2 #no indention