This debug command initiates a forceful reevaluation of all region assignments for the AI of your current country. If a country tag is specified as an argument, this command will apply to the country with that tag.
ai_plan_regions [country tag]
|Country Tag||Optional. The country tag of the country you wish to apply this command to. If not specified, the country you are playing as will be affected.|
Search Our Database of 304 EU4 Console Commands
The above command would make the AI reevaluate all region assignments for your country.
As Delhi has a country tag of DLH, this command would do the same as the first example, but for Delhi instead.