Unity Error : An error occurred while resolving packages project has invalid dependencies unity.

"An error occurred while resolving packages: Package com.unity.render-pipelines.lightweight@2.0.3-preview has invalid dependencies: com.unity.render-pipelines.core: Version [2.0.3-preview] is incompatible with the selected version [2.0.0-preview] One or more packages could not be added to the local file system: com.unity.render-pipelines.core: Package [com.unity.render-pipelines.core@2.0.0-preview] cannot be found A re-import of the project may be required to fix the issue or a manual modification of C:/Users//Documents/Posteffects/Packages/manifest.json file." "