diff --git a/application/module-language-school/src/main/java/org/fuseri/modulelanguageschool/datainitializer/DataInitializer.java b/application/module-language-school/src/main/java/org/fuseri/modulelanguageschool/datainitializer/DataInitializer.java
index e4d5bf5092ca4d2428d9aeab583369ae9ba948c1..b08da68c90f825334ca73c1373c16dec6f19fea1 100644
--- a/application/module-language-school/src/main/java/org/fuseri/modulelanguageschool/datainitializer/DataInitializer.java
+++ b/application/module-language-school/src/main/java/org/fuseri/modulelanguageschool/datainitializer/DataInitializer.java
@@ -16,7 +16,6 @@ import org.springframework.stereotype.Component;
 
 import java.time.LocalDateTime;
 import java.util.ArrayList;
-import java.util.HashSet;
 import java.util.List;
 
 @Component
@@ -48,8 +47,9 @@ public class DataInitializer {
     }
 
     public void drop() {
-        userRepository.deleteAll();
+        lectureRepository.deleteAll();
         courseRepository.deleteAll();
+        userRepository.deleteAll();
     }
 
     public void initialize() {