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java.util.ConcurrentModificationException: null at java.util.LinkedHashMap$LinkedHashIterator.nextNode(Unknown Source)[?:1.8.0_151] at java.util.LinkedHashMap$LinkedKeyIterator.next(Unknown Source)[?:1.8.0_151] at java.util.AbstractCollection.toArray(Unknown Source)[?:1.8.0_151] at java.util.ArrayList.<init>(Unknown Source)[?:1.8.0_151] at nl.komtek.pt.bot.strategy.helper.StrategyRunnerHelper.getLastDCAMonitoringData(StrategyRunnerHelper.java:729)[classes!/:1.2.6.6] at nl.komtek.pt.bot.strategy.helper.StrategyRunnerHelper.DCAEnabled(StrategyRunnerHelper.java:74)[classes!/:1.2.6.6] at nl.komtek.pt.strategyrunner.GainStrategyRunner.checkSellStrategy(GainStrategyRunner.java:77)[classes!/:1.2.6.6]