Manderly - Stark love

Hello.
Starks gets an 25 opinion bonus from the Manderlys.
When Jon Snow forms an new dynasty he gets "Targaryan like" bonus for taming and hatching dragons because the new dynasty honours both houses.
but this does not include the "Stark - Manderly love" event. I feel this should be included for the Stark-Targaryans as well.

I tried implementing it by adding it to the code, but I cant seem to make it work: what am I missing?
(Dynasty 1559 is Stark-Targaryan)

character_event = {
id = 251300
desc = "EVTDESC251300"

is_triggered_only = yes
only_rulers = yes

trigger = {
dynasty = 80
any_playable_ruler  = {            
dynasty = 59
dynasty = 1559
NOT = {
ROOT = {
has_opinion_modifier = { who = PREV modifier = opinion_debt_remembered }
}
}
}
}

option = {
name = "EVTOPTA251300"
any_playable_ruler  = {
limit = {
dynasty = 59
dynasty = 1559
NOT = {
ROOT = {
has_opinion_modifier = { who = PREV modifier = opinion_debt_remembered }
}
}
}
reverse_opinion = {
who = ROOT
modifier = opinion_debt_remembered
years = 200
}
}
}
}