diff --git a/scripts/upgrade b/scripts/upgrade
index d5035cc..73600b3 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -127,6 +127,11 @@ sleep 5
 # remove data directory backup
 ynh_secure_remove --file="$tmp_data_backup"
 
+# clean duplicate folder if exist
+if [ -d "$install_dir/data/data" ]
+	ynh_secure_remove --file="$install_dir/data/data"
+fi
+
 #=================================================
 # END OF SCRIPT
 #=================================================