Unity(유니티)_An error occurred while resolving packages: Project has invalid dependencies: com.unity.modules.accessibility: Package [com.unity.modules.accessibility@1.0.0] cannot be found

에디터 버전 다운그레이드 시 나오는 오류

An error occurred while resolving packages:
  Project has invalid dependencies:
    com.unity.modules.accessibility:
 Package [com.unity.modules.accessibility@1.0.0] cannot be found

해당 프로젝트 폴더에 프로젝트를 열기 전에 
모든 임시 파일(.csproj 및 .sln 파일과 Library/Log/obj 폴더)을 삭제.

+Packages/manifest.json을 열고 다음 줄을 제거.

    "com.unity.modules.accessibility" : "1.0.0"