CloudWatchApi error

[sheldon-sminq]

Hi
Thanks for the quick previous update, i am now getting the following error

Causing: java.util.concurrent.ExecutionException: com.amazonaws.services.cloudwatch.model.InvalidParameterValueException: No metric may specify the same dimension name twice.
! No metric may specify the same dimension name twice.
! No metric may specify the same dimension name twice.
! No metric may specify the same dimension name twice.
! No metric may specify the same dimension name twice. (Service: AmazonCloudWatch; Status Code: 400; Error Code: InvalidParameterValue; Request ID: cff554b1-5922-11e5-a591-9551e4b9dafe)
! at java.util.concurrent.FutureTask.report(FutureTask.java:122) [na:1.8.0_45]
! at java.util.concurrent.FutureTask.get(FutureTask.java:192) [na:1.8.0_45]
! at com.blacklocus.metrics.CloudWatchReporter.report(CloudWatchReporter.java:228) ~[sminq-api-1.2.4.jar:1.2.4]
! at com.damick.dropwizard.metrics.cloudwatch.CloudWatchMachineDimensionReporter.report(CloudWatchMachineDimensionReporter.java:41) [sminq-api-1.2.4.jar:1.2.4]
! at com.codahale.metrics.ScheduledReporter.report(ScheduledReporter.java:162) [sminq-api-1.2.4.jar:1.2.4]
! at com.codahale.metrics.ScheduledReporter$1.run(ScheduledReporter.java:117) [sminq-api-1.2.4.jar:1.2.4]
! at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_45]
! at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) [na:1.8.0_45]
! at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_45]
! at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) [na:1.8.0_45]
! at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_45]
! at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_45]
! at java.lang.Thread.run(Thread.java:745) [na:1.8.0_45]

Did not get any info on the API documentation site for CloudWatch, am i configuring something wrong here?