29.03 10:09:14 [Server] WARN [Factions] Task #137487 for Factions v1.6.9.5-U0.2.1-RC-SF-1.0.20 generated an exception
29.03 10:09:14 [Server] INFO java.util.ConcurrentModificationException: null
29.03 10:09:14 [Server] INFO at java.util.HashMap$HashIterator.nextNode(HashMap.java:1442) ~[?:1.8.0_152]
29.03 10:09:14 [Server] INFO at java.util.HashMap$KeyIterator.next(HashMap.java:1466) ~[?:1.8.0_152]
29.03 10:09:14 [Server] INFO at com.massivecraft.factions.cmd.CmdFly$2.run(CmdFly.java:189) ~[?:?]
29.03 10:09:14 [Server] INFO at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftTask.run(CraftTask.java:58) ~[patched_1.12.2.jar:git-Paper-1373]
29.03 10:09:14 [Server] INFO at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:415) [patched_1.12.2.jar:git-Paper-1373]
29.03 10:09:14 [Server] INFO at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:833) [patched_1.12.2.jar:git-Paper-1373]
29.03 10:09:14 [Server] INFO at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:426) [patched_1.12.2.jar:git-Paper-1373]
29.03 10:09:14 [Server] INFO at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:767) [patched_1.12.2.jar:git-Paper-1373]
29.03 10:09:14 [Server] INFO at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:665) [patched_1.12.2.jar:git-Paper-1373]
29.03 10:09:14 [Server] INFO at java.lang.Thread.run(Thread.java:748) [?:1.8.0_152]