2018-01-05 13:34:41,618 : ERROR : KNIME-Worker-6 : Database Reader : Database Reader : 2:1 : Execute failed: Encountered duplicate row ID  "Row0" at row number 2
2018-01-05 13:34:41,619 : DEBUG : KNIME-Worker-6 : Database Reader : Database Reader : 2:1 : Execute failed: Encountered duplicate row ID  "Row0" at row number 2
org.knime.core.util.DuplicateKeyException: Encountered duplicate row ID  "Row0" at row number 2
        at org.knime.core.data.container.DataContainer.checkAsyncWriteThrowable(DataContainer.java:514)
        at org.knime.core.data.container.DataContainer.offerToAsynchronousQueue(DataContainer.java:668)
        at org.knime.core.data.container.DataContainer.close(DataContainer.java:616)
        at org.knime.core.node.ExecutionContext.createBufferedDataTable(ExecutionContext.java:254)
        at org.knime.core.node.port.database.reader.DBReaderImpl.createTable(DBReaderImpl.java:248)
        at org.knime.core.node.port.database.reader.DBReader.createTable(DBReader.java:121)
        at org.knime.base.node.io.database.DBReaderNodeModel.getResultTable(DBReaderNodeModel.java:150)
        at org.knime.base.node.io.database.DBReaderNodeModel.execute(DBReaderNodeModel.java:127)
        at org.knime.core.node.NodeModel.executeModel(NodeModel.java:567)
        at org.knime.core.node.Node.invokeFullyNodeModelExecute(Node.java:1128)
        at org.knime.core.node.Node.execute(Node.java:915)
        at org.knime.core.node.workflow.NativeNodeContainer.performExecuteNode(NativeNodeContainer.java:561)
        at org.knime.core.node.exec.LocalNodeExecutionJob.mainExecute(LocalNodeExecutionJob.java:95)
        at org.knime.core.node.workflow.NodeExecutionJob.internalRun(NodeExecutionJob.java:179)
        at org.knime.core.node.workflow.NodeExecutionJob.run(NodeExecutionJob.java:110)
        at org.knime.core.util.ThreadUtils$RunnableWithContextImpl.runWithContext(ThreadUtils.java:328)
        at org.knime.core.util.ThreadUtils$RunnableWithContext.run(ThreadUtils.java:204)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at org.knime.core.util.ThreadPool$MyFuture.run(ThreadPool.java:123)
        at org.knime.core.util.ThreadPool$Worker.run(ThreadPool.java:246)
Caused by: org.knime.core.util.DuplicateKeyException: Encountered duplicate row ID  "Row0" at row number 2
        at org.knime.core.data.container.DataContainer.addRowKeyForDuplicateCheck(DataContainer.java:845)
        at org.knime.core.data.container.DataContainer.addRowToTableWrite(DataContainer.java:498)
        at org.knime.core.data.container.DataContainer.access$6(DataContainer.java:460)
        at org.knime.core.data.container.DataContainer$ASyncWriteCallable.callWithContext(DataContainer.java:1236)
        at org.knime.core.data.container.DataContainer$ASyncWriteCallable.call(DataContainer.java:1206)
        at org.knime.core.data.container.DataContainer$ASyncWriteCallable.call(DataContainer.java:1)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)