ConcurrentModificationException when switching Galaxies on Custom Celestial Selection Screen

---Issue Report---

(PLEASE DONT DELETE THIS TEMPLATE, YOUR ISSUE WILL BE IGNORED AND CLOSED IF YOU DO. | Required)

Have you checked Closed Issues (if applicable & PLEASE CHECK BEFORE POSTING | Required): [Yes or No] Yes

Description of Issue(Required)

With ExtraPlanets and some other mods, I place a rocket and launch into space (with needed materials), but when it opens the map to select a planet, the game starts glitching, then crashes.

Steps to Reproduce Issue(Required)

Go in multiplayer or single player and build a rocket, launch pad, and parachute
Launch the rocket and wait till you get to the menu,

Crash log/Log (if applicable): [PASTEBIN. Do NOT copy and paste the log into the issue post itself. See below on how to get them]

How do i locate a crash log see https://docs.mjrlegends.com/General%20Minecraft/crash-log/ https://pastebin.com/G4LbbqjW

Screenshots (if applicable):

Mod List (Required):

Buildcraft CraftTweaker Additional Mobs Additional Pipes for Buildcraft Applied Energistics 2 AsmodeusCore Better Advancements Brandon's Core BuildCraft RF: ReFluxified Carry On CodeChicken Lib 1.8.+ CoFH Core CoFH World Comforts (Fabric/Forge/Quilt) ConnectedTexturesMod Converting Industrial Wires Draconic Evolution ExtraPlanets Fast Leaf Decay Food Expansion Galactic Research Galacticraft Legacy Galacticraft Tweaker Immersive Engineering Industrial Craft Industrial Wires Infinity Craft Iron Chests JourneyMap Just Enough Items (JEI) LLibrary Lucraft: Core Macaw's Furniture Mantle MixinBooter MJRLegends Lib Moar Tinkers Mowzie's Mobs OpenBlocks Elevator Patchouli Redstone Flux Reeves's Furniture [FABRI Rhodonite - Tools & Armour Space Ambient [Addon for GalactiCraft] StarMaker [Addon for GalactiCraft] SteveKunG's Lib Stone Armour Mod The Twilight Forest Tinker's JEI Tinkers Construct Tinkers' Complement KnightMiner Tinkers' Tool Leveling Twilight Tweaks VeinMiner Waystones Version of Mod using (PLEASE DONT USE 'Latest' OR 'Newest' | Required): [VERSION] 1.12.2 CurseForge Where did this bug happen(Required): [Single Player or Server] Both in Single Player and in Server

Additional Information

[Any other information that may be able to help me with the problem] Nope

MJRLegends / ExtraPlanets