I have no clue what is causing this,

sx.blah.discord.util.DiscordException: Error on request to https://discordapp.com/api/guilds/176434793674833920/members/68838926311231488. Received response code 400. With response text: {"roles": ["1"]}
        at sx.blah.discord.api.internal.Requests$Request.request(Requests.java:299)
        at sx.blah.discord.api.internal.Requests$Request.request(Requests.java:229)
        at sx.blah.discord.api.internal.Requests$Request.makeRequest(Requests.java:218)
        at sx.blah.discord.api.internal.Requests$Request.makeRequest(Requests.java:172)
        at sx.blah.discord.handle.impl.obj.Guild.editUserRoles(Guild.java:420)
        at Main.Utility.lambda$roleManagement$6(Utility.java:439)
        at Main.Utility$$Lambda$131/1846395948.request(Unknown Source)
        at sx.blah.discord.util.RequestBuffer$RequestFuture$RequestCallable.call(RequestBuffer.java:258)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at sx.blah.discord.util.RequestBuffer$RequestFuture.run(RequestBuffer.java:233)
        at sx.blah.discord.util.RequestBuffer$RequestFuture.access$200(RequestBuffer.java:145)
        at sx.blah.discord.util.RequestBuffer.lambda$request$0(RequestBuffer.java:32)
        at sx.blah.discord.util.RequestBuffer$$Lambda$72/243068336.run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)