diff --git a/lib/cartodb/controllers/layergroup.js b/lib/cartodb/controllers/layergroup.js
index 1d937374..5747be57 100644
--- a/lib/cartodb/controllers/layergroup.js
+++ b/lib/cartodb/controllers/layergroup.js
@@ -513,24 +513,27 @@ LayergroupController.prototype.getAffectedTables = function(user, dbName, layerg
 
             return queries.length ? queries.join(';') : null;
         },
-        function findAffectedTables(err, sql) {
+        function getConnection(err, sql) {
             assert.ifError(err);
 
             if ( ! sql ) {
                 throw new Error("this request doesn't need an X-Cache-Channel generated");
             }
 
-            step(
-                function getConnection() {
-                    self.pgConnection.getConnection(user, this);
-                },
-                function getAffectedTables(err, connection) {
-                    assert.ifError(err);
+            const next = this;
 
-                    QueryTables.getAffectedTablesFromQuery(connection, sql, this);
-                },
-                this
-            );
+            self.pgConnection.getConnection(user, function (err, connection) {
+                if (err) {
+                    return next();
+                }
+
+                next(null, connection, sql);
+            });
+        },
+        function getAffectedTables(err, connection, sql) {
+            assert.ifError(err);
+
+            QueryTables.getAffectedTablesFromQuery(connection, sql, this);
         },
         function buildCacheChannel(err, tables) {
             assert.ifError(err);