diff --git a/include/xrpl/protocol/Protocol.h b/include/xrpl/protocol/Protocol.h
index f387ea56de..9938a9b768 100644
--- a/include/xrpl/protocol/Protocol.h
+++ b/include/xrpl/protocol/Protocol.h
@@ -324,7 +324,6 @@ constexpr std::uint8_t kVaultMaximumIouScale = 18;
  */
 enum class VaultVersion : uint8_t {
     Legacy = 0,
-    Invalid,
     CashBasis,
 };
 
diff --git a/src/libxrpl/ledger/helpers/VaultHelpers.cpp b/src/libxrpl/ledger/helpers/VaultHelpers.cpp
index 5b2694250d..1ac4abdca3 100644
--- a/src/libxrpl/ledger/helpers/VaultHelpers.cpp
+++ b/src/libxrpl/ledger/helpers/VaultHelpers.cpp
@@ -149,10 +149,13 @@ getVaultVersion(SLE::const_ref vault)
     {
         case 0:
             return VaultVersion::Legacy;
-        case 2:
+        case 1:
             return VaultVersion::CashBasis;
         default:
-            return VaultVersion::Invalid;
+            // LCOV_EXCL_START
+            UNREACHABLE("xrpl::getVaultVersion : invalid vault version");
+            return VaultVersion::Legacy;
+            // LCOV_EXCL_STOP
     }
 }