~/dev_ws$ colcon build
[0.272s] ERROR:colcon:colcon build: Duplicate package names not supported:
- learning_pkg_c:
  - src/learning_pkg_c
  - src/ros2_21_tutorials/learning_pkg_c
- learning_pkg_python:
  - src/learning_pkg_python
  - src/ros2_21_tutorials/learning_pkg_python

求大佬讲解一下