diff --git a/CK2Plus/common/on_actions/000_CK2Plus_vanilla_on_actions.txt b/CK2Plus/common/on_actions/000_CK2Plus_vanilla_on_actions.txt
index d7350f626..97005287b 100644
--- a/CK2Plus/common/on_actions/000_CK2Plus_vanilla_on_actions.txt
+++ b/CK2Plus/common/on_actions/000_CK2Plus_vanilla_on_actions.txt
@@ -2,7 +2,6 @@
 # ALWAYS need to check if they should run.
 on_startup = {
 	events = {
-		SSI.200 # Check for playable aztec invasion
 	}
 }
 
diff --git a/CK2Plus/common/on_actions/99_CK2Plus_on_actions.txt b/CK2Plus/common/on_actions/99_CK2Plus_on_actions.txt
index 2c1027f55..14cc842fb 100644
--- a/CK2Plus/common/on_actions/99_CK2Plus_on_actions.txt
+++ b/CK2Plus/common/on_actions/99_CK2Plus_on_actions.txt
@@ -16,6 +16,7 @@ on_startup = {
 	events = {
 		maintPlus.012 # Checksum warning
 		Plus.1752 # Ironman warning
+		PlusSSI.200 # Check for playable aztec invasion
 	}
 }
 
diff --git a/CK2Plus/events/000_CK2Plus_sunset_invasion.txt b/CK2Plus/events/000_CK2Plus_sunset_invasion.txt
index 471964e4b..f9d69f65c 100644
--- a/CK2Plus/events/000_CK2Plus_sunset_invasion.txt
+++ b/CK2Plus/events/000_CK2Plus_sunset_invasion.txt
@@ -1,6 +1,8 @@
+namespace = PlusSSI
+
 # Check for playable Aztec invasion
 character_event = {
-	id = SSI.200
+	id = PlusSSI.200
 
 	hide_window = yes
 	is_triggered_only = yes
@@ -30,7 +32,7 @@ character_event = {
 					}
 				}
 
-				character_event = { id = SSI.201 }
+				character_event = { id = PlusSSI.201 }
 			}
 		}
 	}
@@ -38,7 +40,7 @@ character_event = {
 
 # Ask player about becoming Aztec invader
 character_event = {
-	id = SSI.201
+	id = PlusSSI.201
 	desc = EVTDESC_SSI_001
 	picture = GFX_evt_aztec_explorers
 	border = GFX_event_normal_frame_war