So, I wanted to import this world that we were playing on aternos before to my new server. Unfortunately it was the same name as default world but i renamed it.
The problem is that with all those problem fixed Multiverse STILL doesn't want to import it saying that my server didn't like it.

15:53:12] [Server thread/INFO]: OzimekPL issued server command: /mv import frakcje normal
[15:53:12] [Server thread/INFO]: OzimekPL: Starting import of world 'frakcje'...
[15:53:12] [Server thread/INFO]: [Multiverse-Core] Loading World & Settings - 'frakcje' - Env: NORMAL - Type: null
[15:53:12] [Server thread/INFO]: -------- World Settings For [zaswiaty] --------
[15:53:12] [Server thread/INFO]: Max TNT Explosions: 100
[15:53:12] [Server thread/INFO]: Tile Max Tick Time: 50ms Entity max Tick Time: 50ms
[15:53:12] [Server thread/INFO]: Mob Spawn Range: 6
[15:53:12] [Server thread/INFO]: Experience Merge Radius: 3.0
[15:53:12] [Server thread/INFO]: Cactus Growth Modifier: 100%
[15:53:12] [Server thread/INFO]: Cane Growth Modifier: 100%
[15:53:12] [Server thread/INFO]: Melon Growth Modifier: 100%
[15:53:12] [Server thread/INFO]: Mushroom Growth Modifier: 100%
[15:53:12] [Server thread/INFO]: Pumpkin Growth Modifier: 100%
[15:53:12] [Server thread/INFO]: Sapling Growth Modifier: 100%
[15:53:12] [Server thread/INFO]: Beetroot Growth Modifier: 100%
[15:53:12] [Server thread/INFO]: Carrot Growth Modifier: 100%
[15:53:12] [Server thread/INFO]: Potato Growth Modifier: 100%
[15:53:12] [Server thread/INFO]: Wheat Growth Modifier: 100%
[15:53:12] [Server thread/INFO]: NetherWart Growth Modifier: 100%
[15:53:12] [Server thread/INFO]: Vine Growth Modifier: 100%
[15:53:12] [Server thread/INFO]: Cocoa Growth Modifier: 100%
[15:53:12] [Server thread/INFO]: Bamboo Growth Modifier: 100%
[15:53:12] [Server thread/INFO]: SweetBerry Growth Modifier: 100%
[15:53:12] [Server thread/INFO]: Kelp Growth Modifier: 100%
[15:53:12] [Server thread/INFO]: Entity Activation Range: An 32 / Mo 32 / Ra 48 / Mi 16 / Tiv true
[15:53:12] [Server thread/INFO]: Hopper Transfer: 8 Hopper Check: 1 Hopper Amount: 1
[15:53:12] [Server thread/INFO]: Custom Map Seeds: Village: 10387312 Desert: 14357617 Igloo: 14357618 Jungle: 14357619 Swamp: 14357620 Monument: 10387313 Ocean: 14357621 Shipwreck: 165745295 End City: 10387313 Slime: 987234911 Bastion: 30084232 Fortress: 30084232 Mansion: 10387319 Fossil: 14357921 Portal: 34222645
[15:53:12] [Server thread/INFO]: Entity Tracking Range: Pl 48 / An 48 / Mo 48 / Mi 32 / Other 64
[15:53:12] [Server thread/INFO]: Allow Zombie Pigmen to spawn from portal blocks: true
[15:53:12] [Server thread/INFO]: Item Despawn Rate: 6000
[15:53:12] [Server thread/INFO]: Item Merge Radius: 2.5
[15:53:12] [Server thread/INFO]: View Distance: 10
[15:53:12] [Server thread/INFO]: Arrow Despawn Rate: 1200 Trident Respawn Rate:1200
[15:53:12] [Server thread/INFO]: Zombie Aggressive Towards Villager: true
[15:53:12] [Server thread/INFO]: Nerfing mobs spawned from spawners: false
[15:53:12] [Server thread/ERROR]: [Multiverse-Core] The world 'frakcje' could NOT be loaded because the server didn't like it!
[15:53:12] [Server thread/ERROR]: [Multiverse-Core] We don't really know why this is. Contact the developer of your server software!
[15:53:12] [Server thread/ERROR]: [Multiverse-Core] Server version info: git-Spigot-758abbe-2b00831 (MC: 1.16.1)
[15:53:12] [Server thread/ERROR]: [Multiverse-Core] Failed to Create/Load the world 'frakcje'
[15:53:12] [Server thread/INFO]: OzimekPL: Failed!

Why does my server dont like it? It's perfectly fine when playing single player but my server just says nope. Please help me someone