diff --git a/stack_definition.json b/stack_definition.json
index 1bf4f40..702a997 100644
--- a/stack_definition.json
+++ b/stack_definition.json
@@ -112,7 +112,7 @@
         }
       ],
       "name": "1a - Key management",
-      "version_locator": "7a4d68b4-cf8b-40cd-a3d1-f49aff526eb3.7f57ef48-2bb2-4641-8f6e-db27a7eacc38-global"
+      "version_locator": "7a4d68b4-cf8b-40cd-a3d1-f49aff526eb3.3b5c0ef5-6438-4e7b-8a88-88636bc590c6-global"
     },
     {
       "inputs": [
@@ -134,7 +134,7 @@
         }
       ],
       "name": "1b - Object storage",
-      "version_locator": "7a4d68b4-cf8b-40cd-a3d1-f49aff526eb3.54ae4d96-9c0d-430c-a5d1-51785ffe4cd0-global"
+      "version_locator": "7a4d68b4-cf8b-40cd-a3d1-f49aff526eb3.f039fa0e-24f7-4c12-a617-1dee12997859-global"
     },
     {
       "inputs": [
@@ -175,16 +175,12 @@
           "value": "ref:../../inputs/enable_platform_logs_metrics"
         },
         {
-          "name": "log_analysis_enable_archive",
-          "value": false
-        },
-        {
-          "name": "log_analysis_provision",
-          "value": true
+          "name": "existing_en_instance_crn",
+          "value": "ref:../../members/3 - Event Notifications/outputs/crn"
         }
       ],
       "name": "2 - Observability",
-      "version_locator": "7a4d68b4-cf8b-40cd-a3d1-f49aff526eb3.2515f999-c6c3-4fa3-81eb-03b26d019bb2-global"
+      "version_locator": "7a4d68b4-cf8b-40cd-a3d1-f49aff526eb3.489dde17-2578-499a-8c3a-781b5248a3da-global"
     },
     {
       "inputs": [
@@ -198,7 +194,7 @@
         },
         {
           "name": "skip_cos_kms_auth_policy",
-          "value": true
+          "value": false
         },
         {
           "name": "kms_endpoint_url",
@@ -230,11 +226,11 @@
         },
         {
           "name": "existing_monitoring_crn",
-          "value": "ref:../../members/2 - Observability/outputs/cloud_monitoring_crn"
+          "value": "__NULL__"
         }
       ],
       "name": "3 - Event Notifications",
-      "version_locator": "7a4d68b4-cf8b-40cd-a3d1-f49aff526eb3.b5b38d6e-441e-4915-ac00-9a75b442a9f0-global"
+      "version_locator": "7a4d68b4-cf8b-40cd-a3d1-f49aff526eb3.dfffe742-c7a1-452e-90b1-3080f1f57f78-global"
     },
     {
       "inputs": [
@@ -272,7 +268,7 @@
         },
         {
           "name": "skip_cos_kms_auth_policy",
-          "value": true
+          "value": false
         },
         {
           "name": "existing_en_crn",
@@ -298,7 +294,7 @@
         }
       ],
       "name": "4a - Security and Compliance Center",
-      "version_locator": "7a4d68b4-cf8b-40cd-a3d1-f49aff526eb3.b27fc8c7-f6ec-4f98-890d-4f7ccfd37aaf-global"
+      "version_locator": "7a4d68b4-cf8b-40cd-a3d1-f49aff526eb3.29b5ef2b-a3c1-4798-9595-ed1263945f82-global"
     },
     {
       "inputs": [
@@ -344,7 +340,7 @@
         }
       ],
       "name": "4b - Secrets Manager",
-      "version_locator": "7a4d68b4-cf8b-40cd-a3d1-f49aff526eb3.03587d2d-38bd-42c3-983b-72469702e038-global"
+      "version_locator": "7a4d68b4-cf8b-40cd-a3d1-f49aff526eb3.e314e905-ca89-4947-aa94-23d270516f0e-global"
     }
   ],
   "outputs": [