就是把服务端里面的地图文件复制改了一下名字用mV加载，加载不上去出现下面报错
: -------- World Settings For [llmt2] --------
[21:23:18 INFO]: Item Despawn Rate: 6000
[21:23:18 INFO]: Item Merge Radius: 4.0
[21:23:18 INFO]: Allow Zombie Pigmen to spawn from portal blocks: true
[21:23:18 INFO]: Zombie Aggressive Towards Villager: true
[21:23:18 INFO]: Arrow Despawn Rate: 300
[21:23:18 INFO]: View Distance: 5
[21:23:18 INFO]: Experience Merge Radius: 6.0
[21:23:18 INFO]: Nerfing mobs spawned from spawners: true
[21:23:18 INFO]: Custom Map Seeds:  Village: 10387312 Feature: 14357617 Monument: 10387313 Slime: 987234911
[21:23:18 INFO]: Structure Info Saving: true
[21:23:18 INFO]: Cactus Growth Modifier: 100%
[21:23:18 INFO]: Cane Growth Modifier: 100%
[21:23:18 INFO]: Melon Growth Modifier: 100%
[21:23:18 INFO]: Mushroom Growth Modifier: 100%
[21:23:18 INFO]: Pumpkin Growth Modifier: 100%
[21:23:18 INFO]: Sapling Growth Modifier: 100%
[21:23:18 INFO]: Wheat Growth Modifier: 100%
[21:23:18 INFO]: NetherWart Growth Modifier: 100%
[21:23:18 INFO]: Vine Growth Modifier: 100%
[21:23:18 INFO]: Cocoa Growth Modifier: 100%
[21:23:18 INFO]: Mob Spawn Range: 3
[21:23:18 INFO]: Entity Activation Range: An 16 / Mo 28 / Mi 6 / Tiv false
[21:23:18 INFO]: Entity Tracking Range: Pl 48 / An 48 / Mo 48 / Mi 32 / Other 64
[21:23:18 INFO]: Random Lighting Updates: false
[21:23:18 INFO]: Tile Max Tick Time: 1000ms Entity max Tick Time: 1000ms
[21:23:18 INFO]: Max TNT Explosions: 100
[21:23:18 INFO]: Hopper Transfer: 8 Hopper Check: 1 Hopper Amount: 1
[21:23:18 ERROR]: Could not save spigot.yml
java.io.FileNotFoundException: spigot.yml (拒绝访问。)
        at java.io.FileOutputStream.open0(Native Method) ~[?:1.8.0_311]
        at java.io.FileOutputStream.open(Unknown Source) ~[?:1.8.0_311]
        at java.io.FileOutputStream.<init>(Unknown Source) ~[?:1.8.0_311]
        at java.io.FileOutputStream.<init>(Unknown Source) ~[?:1.8.0_311]
        at org.bukkit.configuration.file.FileConfiguration.save(FileConfiguration.java:70) ~[spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at org.spigotmc.SpigotConfig.readConfig(SpigotConfig.java:124) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at org.spigotmc.SpigotWorldConfig.init(SpigotWorldConfig.java:26) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at org.spigotmc.SpigotWorldConfig.<init>(SpigotWorldConfig.java:18) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at net.minecraft.server.v1_12_R1.World.<init>(World.java:153) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at net.minecraft.server.v1_12_R1.WorldServer.<init>(WorldServer.java:59) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.createWorld(CraftServer.java:905) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at org.bukkit.Bukkit.createWorld(Bukkit.java:454) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at org.bukkit.WorldCreator.createWorld(WorldCreator.java:261) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at com.onarandombox.MultiverseCore.utils.WorldManager.doLoad(WorldManager.java:466) [%5BM%5D%5B多世界%5DMultiverse-Core.jar:?]
        at com.onarandombox.MultiverseCore.utils.WorldManager.addWorld(WorldManager.java:268) [%5BM%5D%5B多世界%5DMultiverse-Core.jar:?]
        at com.onarandombox.MultiverseCore.commands.ImportCommand.runCommand(ImportCommand.java:152) [%5BM%5D%5B多世界%5DMultiverse-Core.jar:?]
        at com.pneumaticraft.commandhandler.multiverse.CommandHandler.checkAndRunCommand(CommandHandler.java:279) [%5BM%5D%5B多世界%5DMultiverse-Core.jar:?]
        at com.pneumaticraft.commandhandler.multiverse.CommandHandler.processFoundCommands(CommandHandler.java:143) [%5BM%5D%5B多世界%5DMultiverse-Core.jar:?]
        at com.pneumaticraft.commandhandler.multiverse.CommandHandler.locateAndRunCommand(CommandHandler.java:93) [%5BM%5D%5B多世界%5DMultiverse-Core.jar:?]
        at com.onarandombox.MultiverseCore.MultiverseCore.onCommand(MultiverseCore.java:919) [%5BM%5D%5B多世界%5DMultiverse-Core.jar:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:648) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at net.minecraft.server.v1_12_R1.PlayerConnection.handleCommand(PlayerConnection.java:1401) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1236) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at net.minecraft.server.v1_12_R1.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_311]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_311]
        at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:748) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) [spigot-1.12.2.jar:git-Spigot-79a30d7-acbc348]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_311]
[21:23:18 INFO]: World llmt2 is a duplicate of another world and has been prevented from loading. Please delete the uid.dat file from llmt2's world directory if you want to be able to load the duplicate world.
[21:23:18 ERROR]: [Multiverse-Core] The world 'llmt2' could NOT be loaded because the server didn't like it!
[21:23:18 ERROR]: [Multiverse-Core] We don't really know why this is. Contact the developer of your server software!
[21:23:18 ERROR]: [Multiverse-Core] Server version info: git-Spigot-79a30d7-acbc348 (MC: 1.12.2)
[21:23:18 ERROR]: [Multiverse-Core] Failed to Create/Load the world 'llmt2'

该世界曾在之前就被禁止加载过。
建议进入服务器之后先用命令 /mv import 世界名 normal 转化一下

但是这个世界现在已经加载了只不过我复制了一下改了名字就重新加载然后就加载不上

这就是你服务器的问题了
通常不应该使用这样的方法重载。

如果只是想单纯改个名，可以使用下列命令，但在使用变量时必须使用 %multiverse_world_alias%
/mv modify set alias 新世界名称 世界实际名称

我不是重载，我是想用两张一模一样的地图，然后复制然后改名字然后加载然后加载失败

那问题就在这了。
你不可以通过这样的方式来复制地图。
但你可以使用 WorldEdit 选中一整个你想要的区域，通过 /mv create 世界名 或从外部导入超平坦世界来做成你想要的样子。

原来是这样啊明白了

那要是想复制地图有没有办法

小面积复制用 WE 圈选区
大面积复制用 Amulet 或者 MCEdit 就行