diff --git a/src/routes/user.js b/src/routes/user.js
index 4282a2308..6ff139f50 100644
--- a/src/routes/user.js
+++ b/src/routes/user.js
@@ -235,7 +235,6 @@ function setGroups(req, res, next) {
 
     user.setGroups(req.params.userId, req.body.groupIds, function (error) {
         if (error && error.reason === UserError.NOT_FOUND) return next(new HttpError(404, 'One or more groups not found'));
-        if (error && error.reason === UserError.NOT_ALLOWED) return next(new HttpError(403, 'Last admin'));
         if (error) return next(new HttpError(500, error));
 
         next(new HttpSuccess(204));
diff --git a/src/user.js b/src/user.js
index bb140f239..ec9fa2b56 100644
--- a/src/user.js
+++ b/src/user.js
@@ -72,7 +72,6 @@ UserError.BAD_USERNAME = 'Bad username';
 UserError.BAD_EMAIL = 'Bad email';
 UserError.BAD_PASSWORD = 'Bad password';
 UserError.BAD_TOKEN = 'Bad token';
-UserError.NOT_ALLOWED = 'Not Allowed';
 
 function validateUsername(username) {
     assert.strictEqual(typeof username, 'string');