Objective MVdWFB640 already exists in this scoreboard

[Kryniowesegryderiusz]

I have this error, which kicks me out my waterfall. It appears on waterfall console, what is weird, but it says MVdWFB640, so it probably could be problem with it.

02.09 21:58:14 [Server] INFO java.lang.IllegalArgumentException: Objective MVdWFB640 already exists in this scoreboard
02.09 21:58:14 [Server] INFO at com.google.common.base.Preconditions.checkArgument(Preconditions.java:191) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at net.md_5.bungee.api.score.Scoreboard.addObjective(Scoreboard.java:55) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at net.md_5.bungee.connection.DownstreamBridge.handle(DownstreamBridge.java:176) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at net.md_5.bungee.protocol.packet.ScoreboardObjective.handle(ScoreboardObjective.java:67) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at net.md_5.bungee.netty.HandlerBoss.channelRead(HandlerBoss.java:105) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:792) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:475) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[waterfall-371.jar:git:Waterfall-Bootstrap:1.16-R0.4-SNAPSHOT:52a5c6f:371]
02.09 21:58:14 [Server] INFO at java.lang.Thread.run(Thread.java:834) [?:?]
02.09 21:58:14 [Server] INFO [Krynio] disconnected with: Serwer na ktorym byles wylaczyl sie. Przeniesiono do Lobby.
02.09 21:58:14 [Server] INFO [/79.189.143.130:59863|Krynio] -> UpstreamBridge has disconnected

On server, whom im beeing kicked from, while reconnecting from other subserver i have MVdWPlaceholderAPI and FeaterBoard 4.28.1