PHPUnit report parsing can lead to adding twice the same measure on a resource

Caused by: org.sonar.api.utils.SonarException: Can not add twice the same measure on org.sonar.api.resources.Project@3241b635[id=5673,key=symfony2,qualifier=TRK]: org.sonar.api.measures.Measure@ec11fc2[id=<null>,metricKey=test_execution_time,metric=Metric[id=30,formula=<null>,key=test_execution_time,description=Execution duration of unit tests,type=MILLISEC,direction=-1,domain=Tests,name=Unit tests duration,qualitative=false,userManaged=false,enabled=true,origin=JAV,worstValue=<null>,bestValue=<null>,optimizedBestValue=false,hidden=false],value=590.0,data=<null>,description=<null>,alertStatus=<null>,alertText=<null>,tendency=<null>,date=<null>,variation1=<null>,variation2=<null>,variation3=<null>,variation4=<null>,variation5=<null>,url=<null>,characteristic=<null>,persistenceMode=FULL]
at org.sonar.batch.index.Bucket.addMeasure(Bucket.java:101)
at org.sonar.batch.index.DefaultIndex.addMeasure(DefaultIndex.java:184)
at org.sonar.batch.DefaultSensorContext.saveMeasure(DefaultSensorContext.java:116)
at org.sonar.plugins.php.phpunit.PhpUnitResultParser.saveClassMeasure(PhpUnitResultParser.java:199)
at org.sonar.plugins.php.phpunit.PhpUnitResultParser.saveTestReportMeasures(PhpUnitResultParser.java:223)
at org.sonar.plugins.php.phpunit.PhpUnitResultParser.parseFile(PhpUnitResultParser.java:162)
at org.sonar.plugins.php.phpunit.PhpUnitResultParser.parse(PhpUnitResultParser.java:146)
at org.sonar.plugins.php.phpunit.PhpUnitSensor.analyse(PhpUnitSensor.java:72)