Invalid advancement frame type crashes server

Description: Exception in server tick loop

java.lang.IllegalArgumentException: Unknown frame type 'SOME_INVALID_VALUE'
	at s.a(SourceFile:31)
	at r.a(SourceFile:72)
	at i$a.a(SourceFile:185)
	at my$1.a(SourceFile:52)
	at my$1.deserialize(SourceFile:48)
	at com.google.gson.internal.bind.TreeTypeAdapter.read(TreeTypeAdapter.java:69)
	at com.google.gson.Gson.fromJson(Gson.java:887)
	at com.google.gson.Gson.fromJson(Gson.java:852)
	at com.google.gson.Gson.fromJson(Gson.java:801)
	at com.google.gson.Gson.fromJson(Gson.java:773)
	at my.d(SourceFile:99)
	at my.a(SourceFile:72)
	at my.<init>(SourceFile:66)
	at nt.b(SourceFile:162)
	at cgc.a(SourceFile:98)
	at cgc.j(SourceFile:130)
	at net.minecraft.server.MinecraftServer.run(SourceFile:436)
	at java.lang.Thread.run(Unknown Source)