[07:47:44 WARN]: [PlayRewards] Plugin PlayRewards v1.0 generated an exception while executing task 35
java.util.ConcurrentModificationException: null
        at java.util.HashMap$HashIterator.nextNode(HashMap.java:1584) ~[?:?]
        at java.util.HashMap$KeyIterator.next(HashMap.java:1607) ~[?:?]
        at me.sturm.playrewards.database.DataContainer.applyChanges(DataContainer.kt:53) ~[?:?]
        at me.sturm.playrewards.RewardsManager$load$3.run(RewardsManager.kt:67) ~[?:?]
        at org.bukkit.craftbukkit.v1_16_R3.scheduler.CraftTask.run(CraftTask.java:100) ~[patched_1.16.5.jar:git-Purpur-1171]
        at org.bukkit.craftbukkit.v1_16_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:58) ~[patched_1.16.5.jar:git-Purpur-1171]
        at com.destroystokyo.paper.ServerSchedulerReportingWrapper.run(ServerSchedulerReportingWrapper.java:22) ~[patched_1.16.5.jar:git-Purpur-1171]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) [?:?]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) [?:?]
        at java.lang.Thread.run(Thread.java:831) [?:?]