Failed to generate native biome; NPE

[cakoyo]

Plugin version: ### 7.2.28

Spigot username: ### caowenkang1

Issue:

(Sorry for my bad English, because it's not my native language)

I used 'Vanilla Enchanted' configuration for my server, but from testing I found that is less 'vanilla'(only few vanilla biome) so I made some custom vanilla biomes(vanilla dark forest, ice flats, sunflower plains, etc.) to let it more 'vanilla', I made the biomes by coping and modifing the pre-made vanilla biome from 'Vanilla Enchanted' configuration (all native-biome name from here)

All of them works fine at first, but a few weeks later EWG crashed when generating some areas(restart server is useless, only some particular areas triggering the crash).

Since it's a production server, I could only workaround this by replacing the custom biomes by default EWG biomes(json), hmmmm it's badly off btw, not only my custom biomes but also the pre-made biomes in 'Vanilla Enchanted' crashed when generating, so I don't think it's a configuration fault

Link to settings file

world-settings: https://pastebin.com/nAjKx9ZP

some of my custom vanilla biomes(they are similar too): https://pastebin.com/pRhP997t (I have enabled 'TUNDRA') https://pastebin.com/Lhnf5GYG https://pastebin.com/bQ1yY49K

Link to error log/crash log

some of the crashes(they are all similar): https://pastebin.com/gfHLdknR https://pastebin.com/FJWCVHum https://pastebin.com/jMykMgwg

I also tried EWG v7.2.29 but no helps

What's going wrong? any help would be appreciate!