diff --git a/src/main/kotlin/dev/fyloz/trial/colorrecipesexplorer/service/MaterialTypeService.kt b/src/main/kotlin/dev/fyloz/trial/colorrecipesexplorer/service/MaterialTypeService.kt
index 563f338..1fa50a0 100644
--- a/src/main/kotlin/dev/fyloz/trial/colorrecipesexplorer/service/MaterialTypeService.kt
+++ b/src/main/kotlin/dev/fyloz/trial/colorrecipesexplorer/service/MaterialTypeService.kt
@@ -56,7 +56,8 @@ class MaterialTypeServiceImpl(repository: MaterialTypeRepository, private val ma
             MaterialType(
                     id = id,
                     name = if (name.isNotBlank()) name else persistedMaterialType.name,
-                    prefix = if (prefix.isNotBlank()) prefix else persistedMaterialType.prefix
+                    prefix = if (prefix.isNotBlank()) prefix else persistedMaterialType.prefix,
+                    systemType = systemType
             )
         })
     }
@@ -75,7 +76,7 @@ class MaterialTypeServiceImpl(repository: MaterialTypeRepository, private val ma
         fun saveOrUpdateSystemType(type: MaterialType) {
             if (existsByName(type.name)) {
                 val persistedMaterialType = getByName(type.name)
-                update(materialType(type, newId = persistedMaterialType.id))
+                update(materialType(type, newId = persistedMaterialType.id, newSystemType = true))
             } else {
                 save(type)
             }