Do not set sendUrl if sendUrl is undefined

package-lock.json

@@ -16,7 +16,7 @@
                 "badge-maker": "^3.3.1",
                 "bcryptjs": "~2.4.3",
                 "bree": "~7.1.5",
-                "cacheable-lookup": "^6.0.4",
+                "cacheable-lookup": "~6.0.4",
                 "chardet": "^1.3.0",
                 "check-password-strength": "^2.0.5",
                 "cheerio": "^1.0.0-rc.10",

server/socket-handlers/status-page-socket-handler.js

@@ -202,7 +202,11 @@ module.exports.statusPageSocketHandler = (socket) => {
                     relationBean.weight = monitorOrder++;
                     relationBean.group_id = groupBean.id;
                     relationBean.monitor_id = monitor.id;
-                    relationBean.send_url = monitor.sendUrl;
+
+                    if (monitor.sendUrl !== undefined) {
+                        relationBean.send_url = monitor.sendUrl;
+                    }
+
                     await R.store(relationBean);
                 }