Im recieving this error which is followed by the crash of my server, i would appreciate any help as i cannot seem to be able to fix this myself...

java.lang.IllegalArgumentException: No enum constant
org.bukkit.block.Biome.LV-223.B.1 (Varda Badlands)
Time: 4/1/19 6:16 PM
Description: Exception in server tick loop

java.lang.IllegalArgumentException: No enum constant
org.bukkit.block.Biome.LV-223.B.1 (Varda Badlands)
at java.lang.Enum.valueOf(Enum.java:238)
at

org.bukkit.craftbukkit.v1_7_R4.block.CraftBlock.initMappings(CraftBlock.java:578)
at

org.bukkit.craftbukkit.v1_7_R4.CraftServer.enablePlugins(CraftServer.java:337)
at

net.minecraft.world.storage.SaveHandler.initBukkitData(SaveHandler.java:462)
at

net.minecraft.world.storage.SaveHandler.func_75757_d(SaveHandler.java:174)
at net.minecraft.world.World. (World.java:349)
at net.minecraft.world.WorldServer. (WorldServer.java:153)
at

net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:356)

The mod is no longer supported for MC version 1.7.10. Please consider updating.

kden