Error with KOREAN characters

[solid.snake.21]

I'm editing a Zarude event for Pokemon Sword, but the program shows "Invalid: OT: Trash Bytes should be cleared" when I put the Korean nickname of the trainer.
I just make a copy-paste of the nick from the original file in the 'Events' section [ https://projectpokemon.org/home/files/file/4556-korean-release-movie-dada-zarude/ ] so I don´t know what is wrong

 

0893-01 - 자루도 - 9F8DC8B7EC4F.pk8

[theSLAYER]

What could have happened: you’ve had an English pokemon in your viewer, then tried to change the language to Korean. As a result, the existing English name became trash bytes.

hold down the control button on your keyboard, then click on the nickname. A window should pop-up, where you can delete trash bytes.