Hi. I'm here to report an issue involving datapacks with this mod and why I'm reporting this about it's datapack(s) is cause I'm sick and tired of losing my worlds due to incomplete or missing data within the datapacks or outdated datapacks of some of the mods that I'm playing with which at some point I lose the world that I would be playing on and how I know this is cause when making a new world you can apply datapacks except for datapacks that mods adds and when I look in there I see some red ones that when I hover my mouse over them they say "Incompatible, made for an older version of Minecraft." When I would try to load into a modded world I get a message that says that the selected datapacks have errors and asks me to either enter safe mode (which I can't enter safe mode) or go to title screen and in the message it says that I can manually fix them which Idk how to fix incomplete, missing, outdated, or even broken datapacks to mods that has these errors!!! (Btw this isn't a bug report, this report is about the mod's datapack(s) being incompatible with minecraft cause it says that the datapack(s) were made for an older version of Minecraft! Why I said this is cause when I was choosing which issue opton to go with I went with a blank issue instead)

1.16 added support for custom dimensions to datapacks, which is still experimental and it clearly says so when you chose to create a world with custom dimensions.

Apart from that, datapacks are there to provide recipes, advancements, tags or scripts. These can't corrupt your world. If there is something wrong with a datapack you will see an error message in the console and the affected file won't be loaded.
"Incompatible, made for an older version of Minecraft." simply means a number in the datapack needs to be changed from 5 to 6. As long as there are no errors, there is nothing wrong with that datapack.

If you 'lost your world', with which I assume you mean it is corrupted, it is most likely not due to some datapack, but rather to a mod messing with the save data or a sudden termination of the game while it is saving.
Corruption of a save file is also very unlikely. If your game immediately crashes or closes the world when loading a save file, it is probably due to some mod throwing an exception. Removing that mod it should just load again.
Still it might not always be preventable, but that's why there is the 'Make Backup' feature in the world selection menu. There are also mods such as AromaBackup and FTB Backups to make backups automatically.

I will change the number from 5 to 6 when I have time.

I changed the pack format from 5 to 6 now in 1.0.19a-mc1.16.2, 1.0.19a-mc1.16.3, 1.0.19a-mc1.16.4.

Btw, maybe you shouldn't blame every mod for the loss of your world. Most of them won't have anything to do with your issue and blaming them when you are trying to get help isn't very nice.
Also, try to formulate proper sentences and use punctuation. It is very hard to understand anything you say currently.

I'll be waiting for you to do that so in the meantime I'll not be playing with this mod unfortunately cause I dont want to be playing modded minecraft with mods that have incompatible datapacks cause I'm just tired of not being able to rejoin my worlds cause when I try to load a saved world a message pops up saying that the selected datapacks have errors that prevent the world from loading which is why I said "I lost my world" or something like that. I didn't lose my world cause of it being corrupted, it was cause I couldn't be able to go into safe mode for the world so that I could manually fix the error cause every time I clicked on "enter safe mode" the world never loads into safe mode so that I could try to fix the problem myself, when the message pops up and says what I've already said there's two options; [Enter Safe Mode] [Return to Title Screen] and every time I would click on "enter safe mode" nothing happens...

Hey, If you have the time could you check out my post on Minecraft forum in the mods discussion category? my post is called Incompatible Datapack Problem (Discussion/Message). Please?... I know that it's not important but its a message regarding to every mc mod owner/creator new or current to understand what my report was about even tho you already know about what the problem was and to send a peaceful (sadly kind of rude :( ) message to the modding community about every mod creator having to update their mod's datapack to spread the word about this problem cause it still exists in some mods except for yours cause you already fixed it... (if you have an account on Minecraft Forum) Again if you have the time to kindly check out my post on mc forum that you can go check out at any time you want, no rush at all, ok.. (Btw I know that this post on here is closed but just wanted to let you know about what I said and if you'll agree or disagree with my message on mc forum)