diff --git a/src/modify.js b/src/modify.js
index 4e98ad0..8d80df4 100644
--- a/src/modify.js
+++ b/src/modify.js
@@ -138,14 +138,13 @@ exports.modifyService = function (
   return modifyLock(env, (json) => {
     const map = getMapFromManifest(json);
     const oldUrl = map[serviceName];
-    const oldIntegrity = json.integrity ? json.integrity[oldUrl] : null;
+    if (oldUrl && json.integrity) {
+      delete json.integrity[oldUrl];
+    }
 
     if (remove) {
       delete map[serviceName];
       delete map[serviceName + "/"];
-      if (oldUrl && json.integrity) {
-        delete json.integrity[oldUrl];
-      }
     } else {
       map[serviceName] = url;
 
@@ -170,9 +169,6 @@ exports.modifyService = function (
         json.integrity = json.integrity ?? {};
         json.integrity[url] = integrity;
       }
-      if (oldUrl && json.integrity) {
-        delete json.integrity[oldUrl];
-      }
     }
     const alphabetical = !!getConfig().alphabetical;
     if (alphabetical) {