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java.util.ConcurrentModificationException: 	at java.util.Hashtable$Enumerator.next(Hashtable.java:1167)	at java.util.HashMap.putAll(HashMap.java:642)	at org.pentaho.di.core.util.StringUtil.environmentSubstitute(StringUtil.java:238)	at org.pentaho.di.core.variables.Variables.environmentSubstitute(Variables.java:163)	at org.pentaho.di.base.AbstractMeta.environmentSubstitute(AbstractMeta.java:1182)	at org.pentaho.di.core.database.DatabaseMeta.environmentSubstitute(DatabaseMeta.java:2566)	at org.pentaho.di.core.database.DatabaseMeta.getQuotedSchemaTableCombination(DatabaseMeta.java:1538)	at org.pentaho.di.core.database.Database.getInsertStatement(Database.java:1210)	at org.pentaho.di.trans.steps.tableoutput.TableOutput.writeToTable(TableOutput.java:237)	at org.pentaho.di.trans.steps.tableoutput.TableOutput.processRow(TableOutput.java:118)	at org.pentaho.di.trans.step.RunThread.run(RunThread.java:62)	at java.lang.Thread.run(Thread.java:745)