paper端1.19.4版本 装了viaversion 和viabackwards跨版本插件后出现如下警告：
[ViaBackwards] Custom worlds heights are NOT SUPPORTED for 1.16 players and older and may lead to errors!
[23:50:30 WARN]: [ViaBackwards] You have min/max set to -64/256
[23:50:30 WARN]: [ViaBackwards] Ignoring plugin channel in incoming REGISTER: FML
[23:50:30 WARN]: [ViaBackwards] Ignoring plugin channel in incoming REGISTER: FML
[23:50:30 WARN]: [ViaBackwards] Ignoring plugin channel in incoming REGISTER: FORGE
不支持自定义高度，可能导致错误？什么意思呀 跨版本插件还值得放进服务端嘛？
[ViaBackwards] Custom worlds heights are NOT SUPPORTED for 1.16 players and older and may lead to errors!
[23:50:30 WARN]: [ViaBackwards] You have min/max set to -64/256
[23:50:30 WARN]: [ViaBackwards] Ignoring plugin channel in incoming REGISTER: FML
[23:50:30 WARN]: [ViaBackwards] Ignoring plugin channel in incoming REGISTER: FML
[23:50:30 WARN]: [ViaBackwards] Ignoring plugin channel in incoming REGISTER: FORGE
不支持自定义高度，可能导致错误？什么意思呀 跨版本插件还值得放进服务端嘛？
1.16之前的地图不支持高度超过256
1.16之后我记得高度到了384 下面方块到了-64
1.16之后我记得高度到了384 下面方块到了-64
实际可能发生的情况是，1.16以下玩家无法进入y轴低于0的地方，因为地图是按照1.19+版本生成