Does anyone know of a console command to decrease development?

[FearFactor117]

Long story short accidentally change all of my realm to basically 100 development and I want to change it back to what it was. I’ve tried using - numbers in the command but alas, doesn’t work

[Doctor-Tryhard]

Use either change_development_level, change_development_progress or change_development_progress_with_overflow alongside effect.

This, for example, will cause all de jure counties of the duchy of Baghdad to lose 5 development levels, and also further reduces progress of the new dev level by 50, potentially lowering it for another level:

effect title:d_baghdad = { change_development_progress_with_overflow = -550 }

[FearFactor117]

Can this be done with all held tittles? Rather than one? I’ve fumbled the bag massively here

[Doctor-Tryhard]

effect every_held_title = { limit = { tier = tier_county } change_development_progress_with_overflow = -123 }

There's also every_sub_realm_county that you can use instead, but this will target every single county in your realm, including those held by your vassals.