我决定从play 2.2.0和scala 2.10.2转到2.3.6和scala 2.11.4。 如果我更新了play（某些依赖项的版本，比如sbt-plugin和play-java-jdbc），一切正常。但是当我将scala版本设置为2.11.4时，会出现以下错误：
[error] /Users/user/my-play-project/conf/routes: routes is already defined as object routes
[error] /Users/user/my-play-project/conf/routes: routes is already defined as class routes
[error] two errors found
[error] (compile:compile) Compilation failed
[error] Total time: 9 s, completed 09.11.2014 4:52:44
所以，可能有人知道，发生了什么？ 我尝试清理并手动删除所有目标目录，但它没有帮助。