diff --git a/x-pack/plugin/core/template-resources/src/main/resources/fleet-agents.json b/x-pack/plugin/core/template-resources/src/main/resources/fleet-agents.json
index 4405b443859d5..00cb1703605b4 100644
--- a/x-pack/plugin/core/template-resources/src/main/resources/fleet-agents.json
+++ b/x-pack/plugin/core/template-resources/src/main/resources/fleet-agents.json
@@ -58,6 +58,9 @@
             }
           }
         },
+        "last_known_status": {
+          "type": "keyword"
+        },
         "unhealthy_reason": {
           "type": "keyword"
         },
diff --git a/x-pack/plugin/fleet/src/main/java/org/elasticsearch/xpack/fleet/Fleet.java b/x-pack/plugin/fleet/src/main/java/org/elasticsearch/xpack/fleet/Fleet.java
index c2a5fe1ebb782..e21d13524f1bf 100644
--- a/x-pack/plugin/fleet/src/main/java/org/elasticsearch/xpack/fleet/Fleet.java
+++ b/x-pack/plugin/fleet/src/main/java/org/elasticsearch/xpack/fleet/Fleet.java
@@ -79,7 +79,7 @@ public class Fleet extends Plugin implements SystemIndexPlugin {
     private static final String MAPPING_VERSION_VARIABLE = "fleet.version";
     private static final List<String> ALLOWED_PRODUCTS = List.of("kibana", "fleet");
     private static final int FLEET_ACTIONS_MAPPINGS_VERSION = 2;
-    private static final int FLEET_AGENTS_MAPPINGS_VERSION = 2;
+    private static final int FLEET_AGENTS_MAPPINGS_VERSION = 3;
     private static final int FLEET_ENROLLMENT_API_KEYS_MAPPINGS_VERSION = 3;
     private static final int FLEET_SECRETS_MAPPINGS_VERSION = 1;
     private static final int FLEET_POLICIES_MAPPINGS_VERSION = 2;