diff --git a/client/gateway/profile/kura/src/main/java/org/eclipse/kapua/client/gateway/kura/proto/KuraPayloadProto.java b/client/gateway/profile/kura/src/main/java/org/eclipse/kapua/client/gateway/kura/proto/KuraPayloadProto.java
index a3496f59857..1cb929a1653 100644
--- a/client/gateway/profile/kura/src/main/java/org/eclipse/kapua/client/gateway/kura/proto/KuraPayloadProto.java
+++ b/client/gateway/profile/kura/src/main/java/org/eclipse/kapua/client/gateway/kura/proto/KuraPayloadProto.java
@@ -3802,7 +3802,7 @@ public <Type> Builder addExtension(
       @java.lang.Override
       public <Type> Builder clearExtension(
           com.google.protobuf.GeneratedMessage.GeneratedExtension<
-              KuraPayloadProto.KuraPayload, ?> extension) {
+              KuraPayloadProto.KuraPayload, Type> extension) {
         return super.clearExtension(extension);
       }
       @java.lang.Override
diff --git a/service/device/call/kura/src/main/java/org/eclipse/kapua/service/device/call/message/kura/proto/KuraPayloadProto.java b/service/device/call/kura/src/main/java/org/eclipse/kapua/service/device/call/message/kura/proto/KuraPayloadProto.java
index 6617d2b1264..5409f3196ba 100644
--- a/service/device/call/kura/src/main/java/org/eclipse/kapua/service/device/call/message/kura/proto/KuraPayloadProto.java
+++ b/service/device/call/kura/src/main/java/org/eclipse/kapua/service/device/call/message/kura/proto/KuraPayloadProto.java
@@ -3802,7 +3802,7 @@ public <Type> Builder addExtension(
       @java.lang.Override
       public <Type> Builder clearExtension(
           com.google.protobuf.GeneratedMessage.GeneratedExtension<
-              org.eclipse.kapua.service.device.call.message.kura.proto.KuraPayloadProto.KuraPayload, ?> extension) {
+              org.eclipse.kapua.service.device.call.message.kura.proto.KuraPayloadProto.KuraPayload, Type> extension) {
         return super.clearExtension(extension);
       }
       @java.lang.Override
diff --git a/simulator-kura/src/main/java/org/eclipse/kapua/kura/simulator/proto/KuraPayloadProto.java b/simulator-kura/src/main/java/org/eclipse/kapua/kura/simulator/proto/KuraPayloadProto.java
index 7744dd03f88..78dcb4ba85e 100644
--- a/simulator-kura/src/main/java/org/eclipse/kapua/kura/simulator/proto/KuraPayloadProto.java
+++ b/simulator-kura/src/main/java/org/eclipse/kapua/kura/simulator/proto/KuraPayloadProto.java
@@ -3802,7 +3802,7 @@ public <Type> Builder addExtension(
       @java.lang.Override
       public <Type> Builder clearExtension(
           com.google.protobuf.GeneratedMessage.GeneratedExtension<
-              KuraPayloadProto.KuraPayload, ?> extension) {
+              KuraPayloadProto.KuraPayload, Type> extension) {
         return super.clearExtension(extension);
       }
       @java.lang.Override