diff --git a/web/support/kb/cloud/percona_manual_sync.rst b/web/support/kb/cloud/percona_manual_sync.rst
index 654e989d7ed43b7531fd255fa8867b9da945a06b..4abc1a2a349c27e3f60d96e011b952e6d44407ab 100644
--- a/web/support/kb/cloud/percona_manual_sync.rst
+++ b/web/support/kb/cloud/percona_manual_sync.rst
@@ -29,20 +29,45 @@ The detailed procedure is described below.
     
   (repeat the command on the other services)
 
-- connect to one of the servers, and force ``mysql`` restart as master::
+- connect to one of the servers, and force ``mysql`` restart as master.
+
+Edit file /etc/mysql/percona-xtradb-cluster.conf.d/mysqld.cnf, you should find the line::
+
+  $ wsrep_cluster_address=gcomm://<ip_1>,<ip_2>
+
+where <ip_1>, <ip_2> are the IP addresses of the other members of the cluster.
+
+Comment this line, copy/paste then remove the IP addresses, leaving::
+
+   $ wsrep_cluster_address=gcomm://
+
+  
+(TODO fix the following commands which do not work)::
 
   $ sudo cp -p /etc/mysql/percona-xtradb-cluster.conf.d/mysqld.cnf
   $ sudo sed -i "s,wsrep_cluster_address.*,wsrep_cluster_address=gcomm://," /etc/mysql/percona-xtradb-cluster.conf.d/mysqld.cnf
 
-  and finally restart MySql::
+Finally restart MySql::
   
   $ sudo service mysql start
 
-.. note:: You should perform the above operation on the last-acting master, 
+.. note1:: You should perform the above operation on the last-acting master, 
     otherwise ``mysql`` will fail to start. If you are unable to determine 
     the last-acting master, edit file ``/var/lib/percona-xtradb-cluster/grastate.dat``
     and set ``safe_to_bootstrap: 1``.
-  
+
+.. note2:: It may happen that mysql server still does not start because of failed transactions. In case try the following procedure. 
+  Looking in the log file ``/var/log/mysql/error.log`` you may find messages like:
+
+  2023-01-30T23:57:22.828179Z 0 [ERROR] Found 7 prepared transactions! It means that mysqld was not...binlog or tc.log file) was manually deleted after a crash. 
+  You have to start mysqld with --tc-heuristic-recover switch to commit or rollback pending transactions.
+
+Issue the following command::
+
+  $ sudo mysqld --tc-heuristic-recover=ROLLBACK
+
+This should fix the failed transactions.
+
 - start ``mysql`` on the remaining nodes, as usual::
 
   $ juju ssh percona-cluster-N sudo systemctl start mysql