diff --git a/edit-mode/function/function.js b/edit-mode/function/function.js
index c84423e..1319ab7 100644
--- a/edit-mode/function/function.js
+++ b/edit-mode/function/function.js
@@ -717,7 +717,9 @@ function updateLinksLag(data) {
                 let predecessor = data.data.find(item => item.id == link.source);
                 if (predecessor) {
                     let lag = gantt.calculateDuration(new Date(predecessor.end_date), new Date(task.start_date));
-                    link.lag = lag;
+                    if (link.type == "0") {
+                        link.lag = lag;
+                    }
                 }
             }
         });