diff --git a/src/types/operation_type.hpp b/src/types/operation_type.hpp
index 29bceb4..6d19620 100644
--- a/src/types/operation_type.hpp
+++ b/src/types/operation_type.hpp
@@ -8,7 +8,6 @@
 
 enum class OperationType : uint32_t
 {
-    single,
     max,
     min,
     avg,
@@ -18,18 +17,15 @@
 namespace utils
 {
 
-constexpr std::array<std::pair<std::string_view, OperationType>, 5>
-    convDataOperationType = {
-        {std::make_pair<std::string_view, OperationType>("SINGLE",
-                                                         OperationType::single),
-         std::make_pair<std::string_view, OperationType>("Maximum",
-                                                         OperationType::max),
-         std::make_pair<std::string_view, OperationType>("Minimum",
-                                                         OperationType::min),
-         std::make_pair<std::string_view, OperationType>("Average",
-                                                         OperationType::avg),
-         std::make_pair<std::string_view, OperationType>("Summation",
-                                                         OperationType::sum)}};
+constexpr std::array<std::pair<std::string_view, OperationType>, 4>
+    convDataOperationType = {{std::make_pair<std::string_view, OperationType>(
+                                  "Maximum", OperationType::max),
+                              std::make_pair<std::string_view, OperationType>(
+                                  "Minimum", OperationType::min),
+                              std::make_pair<std::string_view, OperationType>(
+                                  "Average", OperationType::avg),
+                              std::make_pair<std::string_view, OperationType>(
+                                  "Summation", OperationType::sum)}};
 
 inline OperationType
     toOperationType(std::underlying_type_t<OperationType> value)