diff --git a/packages/plugins/users/src/server.ts b/packages/plugins/users/src/server.ts
index 0050e15be..9335345e3 100644
--- a/packages/plugins/users/src/server.ts
+++ b/packages/plugins/users/src/server.ts
@@ -155,6 +155,10 @@ export default class UsersPlugin extends Plugin<UserPluginConfig> {
   async install(options) {
     const { rootNickname, rootPassword, rootEmail } = this.getInstallingData(options);
     const User = this.db.getCollection('users');
+    if (await User.repository.findOne({ filter: { email: rootEmail } })) {
+      return;
+    }
+
     const user = await User.repository.create({
       values: {
         email: rootEmail,