How to disable Norse invasions?

[Ossory]

I play as slavic king, and it is pretty hard to convert country into ortodoxy and feudalism. My main problem at the moment is prepared invasions from viking earls. I have tried to disable it by changing some lines in defines.lua, but it didnt work.

Which file should I correct to prevent viking prepared invasions?

 

[Tatterhood]

Go into the religions file and remove "allow_viking_invasion = yes" from norse_pagan, I think.

 

[Ossory]

Just to be sure: D:\SteamLibrary\steamapps\common\Crusader Kings II\common\religions?

I have commented this line:

# allow_viking_invasion = yes

Then I loaded my save game and in few monthes I got new message about prepared invasion of some viking in my country.

Then I have tried to set it to no:

allow_viking_invasion = no

Same effect. Two weeks from autosave and Earl Rikulf from Smaland is preparing invasion.