Re-sync slave without lock master

[Stefano Passiatore]

Hi, I've a simple Mysql Replication environment.

Master configuration (ver. 5.7.21):
[mysqld]
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = /var/lib/mysql
log-error = /var/log/mysql/error.log
bind-address = 192.168.97.54
symbolic-links=0

server-id = 1
log_bin = /var/lib/mysql/mysql-bin.log
relay_log = /var/lib/mysql/mysql-relay-bin
expire_logs_days = 4
binlog-format = mixed

max_allowed_packet = 16M
ignore-db-dir=lost+found
innodb_buffer_pool_size = 2048M
innodb_log_file_size = 32M
max_connections = 500
sql-mode = ""

Salve configuration (ver. 5.7.21):
[mysqld]
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = /var/lib/mysql
log-error = /var/log/mysql/error.log
bind-address = 192.168.97.56
symbolic-links=0

server-id = 2
log_bin = /var/lib/mysql/mysql-bin.log
relay_log = /var/lib/mysql/mysql-relay-bin
expire_logs_days = 4
binlog-format = mixed
log-slave-updates = 1
skip-slave-start

max_allowed_packet = 16M
ignore-db-dir=lost+found
innodb_buffer_pool_size = 3072M
innodb_log_file_size = 32M
max_connections = 500
sql-mode = ""

I need to re-sync the slave, so, on the master I run:
mysqldump -p --skip-lock-tables --single-transaction --flush-logs --hex-blob --replace --master-data -A > /tmp/dump.sql

Then dump process takes 25 minutes.

After, on the slave, I import the dump and START SLAVE but I get, every time, the slave error 1062 so every time the replication is broken.

I try to skip the error, but I got severals same error.
how to re-synch master and slave without lock tables?

Thanks a lot
Stefano