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How to fix reactive mongo playframework dependency issue when (trying) using 12.6

Getting this?

java.lang.NoSuchMethodError: play.api.libs.iteratee.Execution$Implicits$.trampoline()Lscala/concurrent/ExecutionContext;

Is your build.sbt including a dependency like this?

"org.reactivemongo" %% "play2-reactivemongo" % "0.12.6-play24"

And you're using playframework version 2.4 (2.4.6 for me specifically)?

Then fix the problem by changing your dependency to:

"org.reactivemongo" %% "play2-reactivemongo" % "0.12.6-play24" exclude("", "play-iteratees_2.11"),
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