diff --git a/docs/en/changes/changes.md b/docs/en/changes/changes.md
index e229cead83..44b62ae03c 100644
--- a/docs/en/changes/changes.md
+++ b/docs/en/changes/changes.md
@@ -2,6 +2,7 @@
 
 #### Project
 
+* Fix `Duplicate class found` due to the `delombok` goal.
 
 #### OAP Server
 
diff --git a/pom.xml b/pom.xml
index 9bd1ada2cc..93f78857d7 100755
--- a/pom.xml
+++ b/pom.xml
@@ -489,6 +489,8 @@
                 <configuration>
                     <sourceDirectory>${project.basedir}/src/main/java</sourceDirectory>
                     <addOutputDirectory>false</addOutputDirectory>
+                    <outputDirectory>${project.build.directory}/delombok</outputDirectory>
+                    <encoding>UTF-8</encoding>
                 </configuration>
                 <executions>
                     <execution>