Please help with the crash

Hello, i have a dedticated SV with 6GB of RAM, but always i have the same crash, pls read:

---- Minecraft Crash Report ----

WARNING: coremods are present:
llibrary (llibrary-core-1.0.11-1.12.2.jar)
SpongeCoremod ([sponge_].jar)
CreativePatchingLoader (CreativeCore_v1.9.90_mc1.12.2.jar)
FutureMC (future-mc-0.1.13.jar)
Do not report to Forge! (If you haven’t disabled the FoamFix coremod, try disabling it in the config! Note that this bit of text will still appear.) (foamfix-0.10.5-1.12.2.jar)
AstralCore (astralsorcery-1.12.2-1.10.19.jar)
OTGCorePlugin (OTG-Core.jar)
MalisisCorePlugin (malisiscore-1.12.2-6.5.1.jar)
McLib core mod (mclib-1.0.4-1.12.2.jar)
CTMCorePlugin (CTM-MC1.12.2-0.3.3.22.jar)
LoadingPlugin (Bloodmoon-MC1.12.2-1.5.3.jar)
Contact their authors BEFORE contacting forge

// There are four lights!

Time: 4/6/20 6:39 PM
Description: Exception in server tick loop

java.lang.NullPointerException: Exception in server tick loop
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:784)
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:397)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526)
at java.lang.Thread.run(Thread.java:748)

A detailed walkthrough of the error, its code path and all known details is as follows:

– Head –
Thread: Server thread
Stacktrace:
at net.minecraft.server.MinecraftServer.handler$zje000$onCrashReport(MinecraftServer.java:4718)

– Sponge PhaseTracker –
Details:
Phase Stack: [Empty stack]
Stacktrace:
at net.minecraft.server.MinecraftServer.handler$zje000$onCrashReport(MinecraftServer.java:4718)
at net.minecraft.server.MinecraftServer.func_71230_b(MinecraftServer.java:889)
at net.minecraft.server.dedicated.DedicatedServer.func_71230_b(DedicatedServer.java:371)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:558)
at java.lang.Thread.run(Thread.java:748)

– System Details –
Details:
Minecraft Version: 1.12.2
Operating System: Linux (amd64) version 4.15.0-43-generic
Java Version: 1.8.0_191, Oracle Corporation
Java VM Version: Java HotSpot™ 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 1985481752 bytes (1893 MB) / 6326583296 bytes (6033 MB) up to 6326583296 bytes (6033 MB)
JVM Flags: 2 total; -Xmx6144M -Xms6144M
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
FML: MCP 9.42 Powered by Forge 14.23.5.2838 87 mods loaded, 86 mods active
States: ‘U’ = Unloaded ‘L’ = Loaded ‘C’ = Constructed ‘H’ = Pre-initialized ‘I’ = Initialized ‘J’ = Post-initialized ‘A’ = Available ‘D’ = Disabled ‘E’ = Errored

Mods:

| State  | ID                   | Version                   | Source                                         | Signature                                |
|:------ |:-------------------- |:------------------------- |:---------------------------------------------- |:---------------------------------------- |
| LCHIJA | minecraft            | 1.12.2                    | minecraft.jar                                  | None                                     |
| LCHIJA | mcp                  | 9.42                      | minecraft.jar                                  | None                                     |
| LCHIJA | FML                  | 8.0.99.99                 | custom.jar                                     | e3c3d50c7c986df74c645c0ac54639741c90a557 |
| LCHIJA | forge                | 14.23.5.2838              | custom.jar                                     | e3c3d50c7c986df74c645c0ac54639741c90a557 |
| LCHIJA | creativecoredummy    | 1.0.0                     | minecraft.jar                                  | None                                     |
| LCHIJA | otgcore              | 1.12.2 - v8.3             | minecraft.jar                                  | None                                     |
| LCHIJA | spongeapi            | 7.1.0-5ef8b0e3            | [_sponge__].jar                                | None                                     |
| LCHIJA | sponge               | 1.12.2-7.1.11-SNAPSHOT    | [_sponge__].jar                                | None                                     |
| LCHIJA | spongeforge          | 1.12.2-2838-7.1.11-RC4005 | [_sponge__].jar                                | None                                     |
| LCHIJA | foamfixcore          | 7.7.4                     | minecraft.jar                                  | None                                     |
| LCHIJA | futuremccore         | 0.1.12                    | minecraft.jar                                  | None                                     |
| LCHIJA | securitycraft        | v1.8.16                   | [1.12.2]+SecurityCraft+v1.8.16.jar             | None                                     |
| LCHIJA | movillages           | 1.5.4                     | [1.12]MoVillages-1.5.4.jar                     | None                                     |
| LCHIJA | deconstruction       | 3.0.4                     | [MC1.12.2]DeconTable-3.0.4.jar                 | None                                     |
| LCHIJA | animalium            | 0.3.8                     | Animalium-0.3.8.jar                            | None                                     |
| LCHIJA | jei                  | 4.15.0.291                | jei_1.12.2-4.15.0.291.jar                      | None                                     |
| LCHIJA | appleskin            | 1.0.9                     | AppleSkin-mc1.12-1.0.9.jar                     | None                                     |
| LCHIJA | baubles              | 1.5.2                     | Baubles-1.12-1.5.2.jar                         | None                                     |
| LCHIJA | astralsorcery        | 1.10.19                   | astralsorcery-1.12.2-1.10.19.jar               | a0f0b759d895c15ceb3e3bcb5f3c2db7c582edf0 |
| LCHIJA | betternether         | 0.1.8.6                   | betternether-0.1.8.6.jar                       | None                                     |
| LCHIJA | bloodmoon            | 1.5.3                     | Bloodmoon-MC1.12.2-1.5.3.jar                   | d72e0dd57935b3e9476212aea0c0df352dd76291 |
| LCHIJA | bookshelf            | 2.3.585                   | Bookshelf-1.12.2-2.3.585.jar                   | d476d1b22b218a10d845928d1665d45fce301b27 |
| LCHIJA | bookworm             | 1.12.2-2.2.0              | bookworm+-+2.2.0+(1.12.2).jar                  | None                                     |
| LCHIJA | cannibalism          | 5.6.3                     | Cannibalism-5.6.3-1.12.2.jar                   | None                                     |
| LCHIJA | casinocraft          | v06                       | CasinoCraft_1.12.2_v06.jar                     | None                                     |
| LCHIJA | chameleon            | 1.12-4.1.3                | Chameleon-1.12-4.1.3.jar                       | None                                     |
| LCHIJA | chisel               | MC1.12.2-0.2.1.35         | Chisel-MC1.12.2-0.2.1.35.jar                   | None                                     |
| LCHIJA | chococraft           | 0.9.1.52                  | chococraft_1.12.1-0.9.1.52.jar                 | None                                     |
| LCHIJA | morpheus             | 1.12.2-3.5.106            | Morpheus-1.12.2-3.5.106.jar                    | None                                     |
| LCHIJA | comforts             | 1.4.1.2                   | comforts-1.12.2-1.4.1.2.jar                    | 5d5b8aee896a4f5ea3f3114784742662a67ad32f |
| LCHIJA | cookingforblockheads | 6.5.0                     | CookingForBlockheads_1.12.2-6.5.0.jar          | None                                     |
| LCHIJA | craftstudioapi       | 1.0.0                     | CraftStudio-1.0.0.93-mc1.12-alpha.jar          | None                                     |
| LCHIJA | opframe              | 1.4.0                     | OnlinePicFrame_v1.4.33_mc1.12.2.jar            | None                                     |
| LCHIJA | playerrevive         | 1.0                       | PlayerRevive_v1.2.30_mc1.12.2.jar              | None                                     |
| LCHIJA | creativecore         | 1.9.9                     | CreativeCore_v1.9.90_mc1.12.2.jar              | None                                     |
| LCHIJA | customnpcs           | 1.12                      | CustomNPCs_1.12.2-(01Oct19).jar                | None                                     |
| LCHIJA | props                | 2.6.3                     | Decocraft-2.6.3_1.12.2.jar                     | None                                     |
| LCHIJA | dragonmounts         | 1.12.2-1.6.3              | DragonMounts2-1.12.2-1.6.3.jar                 | None                                     |
| LCHIJA | dynamictrees         | 1.12.2-0.9.7              | DynamicTrees-1.12.2-0.9.7.jar                  | None                                     |
| LCHIJA | harvestcraft         | 1.12.2zb                  | Pam_s+HarvestCraft+1.12.2ze.jar                | None                                     |
| LCHIJA | dynamictreesphc      | 1.12.2-1.4.2              | DynamicTreesPHC-1.12.2-1.4.2.jar               | None                                     |
| LCHIJA | elevatorid           | 1.3.14                    | ElevatorMod-1.12.2-1.3.14.jar                  | None                                     |
| LCHIJA | emberroot            | 1.3.9                     | EmberRootZoo-1.12.2-1.3.10.jar                 | None                                     |
| LCHIJA | extrautils2          | 1.0                       | extrautils2-1.12-1.9.9.jar                     | None                                     |
| LCHIJA | openterraingenerator | v8.3                      | OpenTerrainGenerator-1.12.2+-+v8.3.jar         | None                                     |
| LCHIJA | farfromhome          | 1.0                       | Far_From_Home-1.12.2-3.5.jar                   | None                                     |
| LCHIJA | fastbench            | 1.7.3                     | FastWorkbench-1.12.2-1.7.3.jar                 | None                                     |
| LCHIJA | fencejumper          | 1.0.5                     | fencejumper-1.12-1.0.5.jar                     | None                                     |
| LCHIJA | ferdinandsflowers    | 1.10.4.1                  | Ferdinand_s+Flowers-1.12.x-1.10.4.1.jar        | None                                     |
| LCHIJA | foamfix              | 0.10.5-1.12.2             | foamfix-0.10.5-1.12.2.jar                      | None                                     |
| LCHIJA | foamflower           | 1.12.2-1.0.0.0-beta1      | foamflower-1.12.2-1.0.0.0-beta1.jar            | None                                     |
| LCHIJA | llibrary             | 1.7.19                    | llibrary-1.7.19-1.12.2.jar                     | b9f30a813bee3b9dd5652c460310cfcd54f6b7ec |
| LCHIJA | fossil               | 8.0.3                     | fossilsarcheology-8.0.3.jar                    | None                                     |
| LCHIJA | ftblib               | 5.4.4.5                   | FTBLib-5.4.4.5.jar                             | None                                     |
| LCHIJA | ftbutilities         | 5.4.0.124                 | FTBUtilities-5.4.0.124.jar                     | None                                     |
| LCHIJA | minecraftfuture      | 0.1.13                    | future-mc-0.1.13.jar                           | None                                     |
| LCHIJA | gottschcore          | 1.11.0                    | GottschCore-mc1.12.2-f14.23.5.2768-v1.11.0.jar | None                                     |
| LCHIJA | hidenames            | 1.4.1                     | HideNames-1.12.2-1.4.1.jar                     | None                                     |
| LCHIJA | waila                | 1.8.26                    | Hwyla-1.8.26-B41_1.12.2.jar                    | None                                     |
| LCHIJA | ichunutil            | 7.2.1                     | iChunUtil-1.12.2-7.2.1.jar                     | 4db5c2bd1b556f252a5b8b54b256d381b2a0a6b8 |
| LCHIJA | mcjtylib_ng          | 3.5.4                     | mcjtylib-1.12-3.5.4.jar                        | None                                     |
| LCHIJA | immcraft             | 1.6.0                     | immcraft-1.12-1.6.0.jar                        | None                                     |
| LCHIJA | infernalmobs         | 1.7.6                     | InfernalMobs-1.12.2.jar                        | None                                     |
| LCHIJA | journeymap           | 1.12.2-5.5.9              | journeymap-1.12.2-5.5.9.jar                    | None                                     |
| LCHIJA | leatherworks         | 1.78.0                    | LeatherWorks-1.12-1.78.0.42.jar                | None                                     |
| LCHIJA | malisiscore          | 1.12.2-6.5.1-SNAPSHOT     | malisiscore-1.12.2-6.5.1.jar                   | None                                     |
| LCHIJA | malisisdoors         | 1.12.2-7.3.0              | malisisdoors-1.12.2-7.3.0.jar                  | None                                     |
| LCHIJA | mca                  | 6.1.0                     | MCA-1.12.2-6.1.0-universal (1).jar             | None                                     |
| LCHIJA | mclib                | 1.0.4                     | mclib-1.0.4-1.12.2.jar                         | None                                     |
| LCHIJA | mowziesmobs          | 1.5.4                     | mowziesmobs-1.5.4.jar                          | None                                     |
| LCHIJA | nightmares           | 1.0.4                     | Nightmares-1.12.2-1.0.4.jar                    | d476d1b22b218a10d845928d1665d45fce301b27 |
| LCHIJA | playerskins          | 1.0.4                     | playerskin-1.12.2-1.0.5.jar                    | None                                     |
| LCHIJA | progressivebosses    | 1.5.0                     | ProgressiveBosses-1.5.0-mc1.12.x.jar           | None                                     |
| LCHIJA | railcraft            | 12.0.0                    | railcraft-12.0.0.jar                           | a0c255ac501b2749537d5824bb0f0588bf0320fa |
| LCHIJA | roost                | 2.0.10                    | roost-1.12.2-2.0.10.jar                        | None                                     |
| LCHIJA | rustic               | 1.1.1                     | rustic-1.1.1.jar                               | None                                     |
| LCHIJA | spartanshields       | 1.5.4                     | SpartanShields-1.12.2-1.5.4.jar                | None                                     |
| LCHIJA | storagedrawers       | 1.12.2-5.4.0              | StorageDrawers-1.12.2-5.4.0.jar                | None                                     |
| LCHIJA | tombstone            | 3.5.5                     | tombstone-3.5.5-1.12.jar                       | None                                     |
| LCHIJA | torchmaster          | 1.8.1.81                  | torchmaster_1.12.2-1.8.1.81.jar                | 5e9a436b366831c8f54a7e80b015784da69278c6 |
| LCHIJA | traverse             | 1.6.0                     | Traverse-1.12.2-1.6.0-69.jar                   | None                                     |
| LCHIJA | treasure2            | 1.9.0                     | Treasure2-mc1.12.2-f14.23.5.2768-v1.9.0.jar    | None                                     |
| LCHIJA | of                   | 0.13.1                    | Useful+Interior+-+0.13.1+[1.12.2].jar          | None                                     |
| LCHIJA | variedcommodities    | 1.12.2                    | VariedCommodities_1.12.2(21nov19).jar          | None                                     |
| UD     | mclib_core           | 1.0.4                     | minecraft.jar                                  | None                                     |


Plugins:

| State  | ID        | Version     | Source                                  | Signature |
|:------ |:--------- |:----------- |:--------------------------------------- |:--------- |
| LCHIJA | luckperms | 5.0.39      | LuckPerms-Sponge-5.0.39.jar             | None      |
| LCHIJA | nucleus   | 1.14.2-S7.1 | Nucleus-1.14.2-S7.1-MC1.12.2-plugin.jar | None      |

Loaded coremods (and transformers): 

llibrary (llibrary-core-1.0.11-1.12.2.jar)
net.ilexiconn.llibrary.server.core.plugin.LLibraryTransformer
net.ilexiconn.llibrary.server.core.patcher.LLibraryRuntimePatcher
SpongeCoremod ([sponge_].jar)
org.spongepowered.common.launch.transformer.SpongeSuperclassTransformer
CreativePatchingLoader (CreativeCore_v1.9.90_mc1.12.2.jar)

FutureMC (future-mc-0.1.13.jar)
thedarkcolour.futuremc.asm.CoreTransformer
Do not report to Forge! (If you haven’t disabled the FoamFix coremod, try disabling it in the config! Note that this bit of text will still appear.) (foamfix-0.10.5-1.12.2.jar)
pl.asie.foamfix.coremod.FoamFixTransformer
AstralCore (astralsorcery-1.12.2-1.10.19.jar)

OTGCorePlugin (OTG-Core.jar)
com.pg85.otg.forge.asm.excluded.OTGClassTransformer
MalisisCorePlugin (malisiscore-1.12.2-6.5.1.jar)

McLib core mod (mclib-1.0.4-1.12.2.jar)
mchorse.mclib.core.McLibCMClassTransformer
CTMCorePlugin (CTM-MC1.12.2-0.3.3.22.jar)
team.chisel.ctm.client.asm.CTMTransformer
LoadingPlugin (Bloodmoon-MC1.12.2-1.5.3.jar)
lumien.bloodmoon.asm.ClassTransformer
Profiler Position: N/A (disabled)
Player Count: 1 / 25; [EntityPlayerMP[‘xonsiiiii’/520429, l=‘world’, x=-6.76, y=200.00, z=302.97]]
Is Modded: Definitely; Server brand changed to ‘fml,forge,sponge’
Type: Dedicated Server (map_server.txt)

OTG and Sponge aren’t compatible with each other. If you want an OTG world, remove Sponge, pregenerate your world with OTG, then remove OTG and reinstall Sponge.

Thanks for your answer, i will delete the OTG mod. Another question that i have is, sometimes in my server there are a lag,how can i solve this issue? when i have lag, this message appears:

World generation frequently causes lag, particularly with certain mods (e.g. OTG). Setting a world border and pre-generating your world before the players arrive will minimise this. You can use timings, or profile your server with the plugin spark, if you still have lag problems after that.