and also the mod that i delted the conflict one i cant find i know the name of the JAR file but i dont have a clue where to  find the mod on curseforge or anywhere else
Any way here is the mod list:

ad_astra-forge-1.20.1-1.15.5.jar

alexsmobs-1.22.5.jar

aquamirae-6.API15.jar

architectury-9.1.12-forge.jar

betterarcheology-1.1.0.jar

biomemakeover-FORGE-1.20.1-1.11.4.jar

 

BiomesOPlenty-1.20.1-18.0.0.598.jar

blockui-1.20.1-1.0.128-BETA.jar

botarium-forge-1.20.1-2.2.1.jar

cfm-forge-1.20.1-7.0.0-pre36.jar

citadel-2.4.9-1.20.1.jar

cloth-config-11.1.118-forge.jar

cristellib-1.1.5-forge.jar

ctov-3.3.6.jar

Cyclic-1.20.1-1.12.5.jar

domum_ornamentum-1.20.1-1.0.148-BETA-universal.jar

ecologics-forge-1.20.1-2.2.0.jar

1.74 MB

EpheroLib-1.20.1-FORGE-1.2.0.jar

EpicFight-20.5.14.jar

FarmersDelight-1.20.1-1.2.3.jar

flib-1.20.1-0.0.11.jar

forbidden_arcanus-1.20.1-2.2.4.jar

geckolib-forge-1.20.1-4.2.4.jar

habitat-1.2.5.jar

JustEnoughMekanismMultiblocks-1.20.1-4.2.jar

macawsroofsbop-1.20-1.0.jar

mcw-roofs-2.2.4b-mc1.20.1forge.jar

Mekanism-1.20.1-10.4.5.19.jar

MekanismAdditions-1.20.1-10.4.5.19.jar

MekanismGenerators-1.20.1-10.4.5.19.jar

MekanismTools-1.20.1-10.4.5.19.jar

minecolonies-1.20.1-1.1.361-RELEASE.jar

MonsterPlus-Forge1.20.1-v1.1.6.1.jar

moonlight-1.20-2.8.75-forge.jar

morevillagers-forge-1.20.1-5.0.0.jar

multipiston-1.20-1.2.31-ALPHA.jar

notenoughcrashes-4.4.6+1.20.1-forge.jar

obscure_api-15.jar

resourcefulconfig-forge-1.20.1-2.1.0.jar

resourcefullib-forge-1.20.1-2.1.20.jar

silent-gear-1.20.1-3.5.3.jar

silent-lib-1.20.1-8.0.0.jar

simplyswords-forge-1.51.5-1.20.1.jar

11.56 MB

sophisticatedbackpacks-1.20.1-3.19.4.978.jar

sophisticatedcore-1.20.1-0.5.111.517.jar

structurize-1.20.1-1.0.674-BETA.jar

stylecolonies-1.2.3.jar

supplementaries-1.20-2.7.15

TerraBlender-forge-1.20.1-3.0.0.169.jar

Towns-and-Towers-1.12-Fabric+Forge.jar

towntalk-1.20.1-1.0.1.jar

untamedwilds-1.20.1-4.0.4.jar

valhelsia_core-forge-1.20.1-1.1.1.jar

YungsApi-1.20-Forge-4.0.2.jar

YungsBetterMineshafts-1.20-Forge-4.0.4.jar

YungsBetterNetherFortresses-1.20-Forge-2.0.5.jar

YungsBetterOceanMonuments-1.20-Forge-3.0.4.jar

YungsBetterStrongholds-1.20-Forge-4.0.3.jar

YungsBetterWitchHuts-1.20-Forge-3.0.3.jar

YungsBridges-1.20-Forge-4.0.3.jar

YungsExtras-1.20-Forge-4.0.3.jar

HERE IS THE CONSOLE FROM THE SERVER

https://mclo.gs/RIRi7ma

its aternos

THE MODS NAME THAT IS THE PROBLEM IS dungeons_1.16.1_mc1.20.1 i cant find a Forge link

 

 

THANK YOU FOR YOUR RESPONSE💖

Looks like you need a different version of the dungeons mod. Also are you using fabric or forge

Forge sorry for late reply

10 hours ago, Wowsomeonecool said:

Looks like you need a different version of the dungeons mod. Also are you using fabric or forge

Forge sorry for late reply

Edited December 30, 20231 yr by RUI29

11 hours ago, Wowsomeonecool said:

Looks like you need a different version of the dungeons mod. Also are you using fabric or forge

And the version of the mod is 1.20.1 i supose so it should be compatible

The client log you posted says you don't have it installed:

Quote

[30Dec2023 00:38:11.824] [main/WARN] [net.minecraftforge.common.ForgeHooks/WP]: The following mods have version differences that were not resolved:

duneons (version 1.16.1 -> MISSING)

Things may not work well.

[30Dec2023 00:38:12.117] [main/ERROR] [net.minecraftforge.registries.GameData/REGISTRIES]: Unidentified mapping from registry minecraft:block

duneons:abyssal_doorcoloon: 5419

etc...

But that "unidentified mapping" error says the server still has it installed.

 

If you search the top of logs/debug.log for the server, it should tell you which mod (jar file) has the mod id "duneons".

Edited December 30, 20231 yr by warjort

Sorry, I misunderstood the context of that error.

You are NOT getting the mappings from a server, you are trying to load a save on the server after uninstalling a mod that modifies the world gen.

This won't work.

Quote

Caused by: java.lang.IllegalStateException: Overworld settings missing

at net.minecraft.world.level.levelgen.WorldDimensions.<init>(WorldDimensions.java:50) ~[server-1.20.1-20230612.114412-srg.jar%23223!/:?]

Minecraft can't load the save because the overworld settings are missing. They were likely defined/modified by that duneons mod.

Edited December 30, 20231 yr by warjort

1 hour ago, warjort said:

Sorry, I misunderstood the context of that error.

You are NOT getting the mappings from a server, you are trying to load a save on the server after uninstalling a mod that modifies the world gen.

This won't work.

Minecraft can't load the save because the overworld settings are missing. They were likely defined/modified by that duneons mod.

I know that but if i put the mod back in then a create a mod conflict i have no idea what to do

I assume you never had a real working version?

Try renaming your save (the server's "world" folder).

That will make it create a new world without the duneon modifications next time you boot the server.

3 hours ago, warjort said:

I assume you never had a real working version?

Try renaming your save (the server's "world" folder).

That will make it create a new world without the duneon modifications next time you boot the server.

Is there any other way than deleting the world?

I said rename not delete. 🙂

The only other way would be get an NBT editor and manually remove the duneons config from the world/level.dat file.

 

I don't recommend this.

Even if you remove that config correctly, there is no guarantee it will work.

The duneons mod might have overwritten important data which you will now be missing altogether.

 

Also the other region files might still contain duneons data? e.g. if that mod adds biomes or structures.

Edited December 30, 20231 yr by warjort