error: New QERR_DUPLICATE_ID

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
diff --git a/qerror.h b/qerror.h
index a2664ab..870cdc3 100644
--- a/qerror.h
+++ b/qerror.h
@@ -88,6 +88,9 @@
 #define QERR_DEVICE_NO_BUS \
     "{ 'class': 'DeviceNoBus', 'data': { 'device': %s } }"
 
+#define QERR_DUPLICATE_ID \
+    "{ 'class': 'DuplicateId', 'data': { 'id': %s, 'object': %s } }"
+
 #define QERR_FD_NOT_FOUND \
     "{ 'class': 'FdNotFound', 'data': { 'name': %s } }"