diff --git a/vertx-gaia/vertx-ams/pom.xml b/vertx-gaia/vertx-ams/pom.xml
index 7dfc27aafee2c5dfbc92f3649b3ea93c8710b79e..71569ddfaedfbb54764794dc0f37a1c80e813bb2 100644
--- a/vertx-gaia/vertx-ams/pom.xml
+++ b/vertx-gaia/vertx-ams/pom.xml
@@ -92,5 +92,9 @@
             <groupId>io.netty</groupId>
             <artifactId>netty-buffer</artifactId>
         </dependency>
+        <dependency>
+            <groupId>cn.vertxup</groupId>
+            <artifactId>vertx-co</artifactId>
+        </dependency>
     </dependencies>
 </project>
\ No newline at end of file
diff --git a/vertx-gaia/vertx-ams/src/main/java/io/horizon/atom/app/KDatabase.java b/vertx-gaia/vertx-ams/src/main/java/io/horizon/atom/app/KDatabase.java
index 2a4bd8b482263b077063e2ab861b9de1e105996d..b5190ec87a836a355139113f8a44ff907d435354 100644
--- a/vertx-gaia/vertx-ams/src/main/java/io/horizon/atom/app/KDatabase.java
+++ b/vertx-gaia/vertx-ams/src/main/java/io/horizon/atom/app/KDatabase.java
@@ -12,6 +12,7 @@ import io.horizon.specification.typed.TJson;
 import io.horizon.uca.log.Annal;
 import io.horizon.util.HUt;
 import io.vertx.core.json.JsonObject;
+import io.vertx.up.commune.config.Database;
 
 import java.io.Serializable;
 import java.sql.DriverManager;
@@ -230,11 +231,11 @@ public class KDatabase implements Serializable, TCopy<KDatabase>, TJson {
 
     @Override
     @SuppressWarnings("unchecked")
-    public <CHILD extends KDatabase> CHILD copy() {
+    public Database copy() {
         final JsonObject json = this.toJson().copy();
-        final KDatabase database = new KDatabase();
+        final Database database = new Database();
         database.fromJson(json);
-        return (CHILD) database;
+        return database;
     }
 
     @Override
diff --git a/vertx-gaia/vertx-co/src/main/java/io/vertx/up/commune/config/Database.java b/vertx-gaia/vertx-co/src/main/java/io/vertx/up/commune/config/Database.java
index 449e286935fb8ea43773208b44c0c03a5a5fa1a5..0c6e229b3b2d2dac2d7297c958398cee3e0608fd 100644
--- a/vertx-gaia/vertx-co/src/main/java/io/vertx/up/commune/config/Database.java
+++ b/vertx-gaia/vertx-co/src/main/java/io/vertx/up/commune/config/Database.java
@@ -65,7 +65,7 @@ public class Database extends KDatabase {
         if (Objects.isNull(DATABASE)) {
             DATABASE = getDatabase(DsSource.PRIMARY, "jooq", CURRENT);
         }
-        return (Database) DATABASE.copy();
+        return DATABASE.copy();
     }
 
     public static Database getHistory() {