I am using a JSON extension which relies on Mandubian\'s play-json 2.2-SNAPSHOT. Everything worked fine until now I have a project based on Scala-STM. sbt reports the following
You can get around this by removing scala-stm with exclude
"dependencyGroupId" %% "dependencyArtifactId" % "dependencyVersion" exclude("org.scala-stm", "scala-stm_2.10.0")
Do not forget to do sbt clean.
sbt clean