diff --git a/src/Socialbox/Enums/StandardError.php b/src/Socialbox/Enums/StandardError.php
index 0cf213d..9dc896c 100644
--- a/src/Socialbox/Enums/StandardError.php
+++ b/src/Socialbox/Enums/StandardError.php
@@ -19,6 +19,7 @@
         case EXPIRED = -108;
         case CRYPTOGRAPHIC_ERROR = -109;
         case UUID_CONFLICT = -110;
+        case UUID_MISMATCH = -111;
 
         // RPC Errors
         case RPC_METHOD_NOT_FOUND = -1000;