diff --git a/src/apps.js b/src/apps.js
index e6fcb3c78..d4eb14322 100644
--- a/src/apps.js
+++ b/src/apps.js
@@ -2506,6 +2506,15 @@ async function restore(app, backupId, auditSource) {
     const newHttpPorts = manifest.httpPorts || {};
     values.secondaryDomains = app.secondaryDomains.filter(sd => sd.environmentVariable in newHttpPorts);
 
+    // prune portBindings whose tcpPorts/udpPorts no longer exist in the restored manifest
+    const newTcpPorts = manifest.tcpPorts || {};
+    const newUdpPorts = manifest.udpPorts || {};
+    const portBindings = {};
+    for (const portName in app.portBindings) {
+        if (portName in newTcpPorts || portName in newUdpPorts) portBindings[portName] = app.portBindings[portName];
+    }
+    values.portBindings = portBindings;
+
     const restoreConfig = { backupId: restoreBackup.id };
 
     const task = {