diff --git a/lib/common/pre.js b/lib/common/pre.js
index 4e9b021..f527e08 100644
--- a/lib/common/pre.js
+++ b/lib/common/pre.js
@@ -13,10 +13,10 @@ function readPre(node, block, result = block) {
         continue;
       }
       const exec = event.script.exec;
-      if (exec.disabled) {
+      if (exec?.disabled) {
         continue;
       }
-      const logic = exec.join('\n').trim();
+      const logic = exec?.join('\n').trim();
       if (!logic) {
         continue;
       }