diff --git a/hosts/scripts/mysql_backup.sh b/hosts/scripts/mysql_backup.sh
index be32570..b64367a 100755
--- a/hosts/scripts/mysql_backup.sh
+++ b/hosts/scripts/mysql_backup.sh
@@ -388,7 +388,7 @@ if $ARCHIVE ;then
 			if [ $srcHost != "localhost" ] || $_via_ssh_tunnel ;then
 				if [ -n "$mysql_credential_args" ] ; then
 					$(
-						$ssh $ssh_options ${ssh_user}@$srcHost "$mysql $mysql_credential_args -N -s -A -e\"SELECT DISTINCT CONCAT('CREATE USER ''',user,'''@''localhost'' IDENTIFIED WITH mysql_native_password ; UPDATE user SET authentication_string = ''',authentication_string,''' WHERE user = ''',user,'''; FLUSH PRIVILEGES;') FROM mysql.user WHERE user<>'' AND user <> 'root' AND user <> 'sys-maint' AND user <> 'debian-sys-maint' AND user <> 'backup' AND user <> 'mysql.sys' AND user <> 'mysql.session'\"" \
+						$ssh $ssh_options ${ssh_user}@$srcHost "$mysql $mysql_credential_args -N -s -A -e\"SELECT DISTINCT CONCAT('CREATE USER IF NOT EXISTS ''',user,'''@''localhost'' IDENTIFIED WITH mysql_native_password ; UPDATE user SET authentication_string = ''',authentication_string,''' WHERE user = ''',user,'''; FLUSH PRIVILEGES;') FROM mysql.user WHERE user<>'' AND user <> 'root' AND user <> 'sys-maint' AND user <> 'debian-sys-maint' AND user <> 'backup' AND user <> 'mysql.sys' AND user <> 'mysql.session'\"" \
 							> ${_backupDestArchiveDir}/MySQLCreateUser-01.sql-${filedate}.sql 2> $err_Log
 						exit $?
 					)
@@ -404,14 +404,14 @@ if $ARCHIVE ;then
 			else
 				if [ -n "$mysql_credential_args" ] ; then
 					$(
-						$mysql $mysql_credential_args -N -s -A -e"SELECT DISTINCT CONCAT('CREATE USER ''',user,'''@''localhost'' IDENTIFIED WITH mysql_native_password ; UPDATE user SET authentication_string = ''',authentication_string,''' WHERE user = ''',user,'''; FLUSH PRIVILEGES;') FROM mysql.user WHERE user<>'' AND user <> 'root' AND user <> 'sys-maint' AND user <> 'debian-sys-maint' AND user <> 'backup' AND user <> 'mysql.sys' AND user <> 'mysql.session'" \
+						$mysql $mysql_credential_args -N -s -A -e"SELECT DISTINCT CONCAT('CREATE USER IF NOT EXISTS ''',user,'''@''localhost'' IDENTIFIED WITH mysql_native_password ; UPDATE user SET authentication_string = ''',authentication_string,''' WHERE user = ''',user,'''; FLUSH PRIVILEGES;') FROM mysql.user WHERE user<>'' AND user <> 'root' AND user <> 'sys-maint' AND user <> 'debian-sys-maint' AND user <> 'backup' AND user <> 'mysql.sys' AND user <> 'mysql.session'" \
 							> ${_backupDestArchiveDir}/MySQLCreateUser-01.sql-${filedate}.sql 2> $err_Log
 						exit $?
 					)
 					retval=$?
 				else
 					$(
-						$mysql -u$mysql_user -p$mysql_password -N -s -A -e"SELECT DISTINCT CONCAT('CREATE USER ''',user,'''@''localhost'' IDENTIFIED WITH mysql_native_password ; UPDATE user SET authentication_string = ''',authentication_string,''' WHERE user = ''',user,'''; FLUSH PRIVILEGES;') FROM mysql.user WHERE user<>'' AND user <> 'root' AND user <> 'sys-maint' AND user <> 'debian-sys-maint' AND user <> 'backup' AND user <> 'mysql.sys' AND user <> 'mysql.session'" \
+						$mysql -u$mysql_user -p$mysql_password -N -s -A -e"SELECT DISTINCT CONCAT('CREATE USER IF NOT EXISTS ''',user,'''@''localhost'' IDENTIFIED WITH mysql_native_password ; UPDATE user SET authentication_string = ''',authentication_string,''' WHERE user = ''',user,'''; FLUSH PRIVILEGES;') FROM mysql.user WHERE user<>'' AND user <> 'root' AND user <> 'sys-maint' AND user <> 'debian-sys-maint' AND user <> 'backup' AND user <> 'mysql.sys' AND user <> 'mysql.session'" \
 							> ${_backupDestArchiveDir}/MySQLCreateUser-01.sql-${filedate}.sql 2> $err_Log
 						exit $?
 					)
@@ -499,14 +499,14 @@ if $ARCHIVE ;then
 			if [ $srcHost != "localhost" ] || $_via_ssh_tunnel ;then
 				if [ -n "$mysql_credential_args" ] ; then
 					$(
-						$ssh $ssh_options ${ssh_user}@$srcHost "$mysql $mysql_credential_args -N -s -A -e\"SELECT DISTINCT CONCAT('CREATE USER ''',user,'''@''localhost'' IDENTIFIED WITH mysql_native_password AS ''',password,'''; ') FROM mysql.user WHERE user<>'' AND user <> 'root' AND user <> 'sys-maint' AND user <> 'debian-sys-maint' AND user <> 'backup' AND user <> 'mysql.sys' AND user <> 'mysql.session'\"" \
+						$ssh $ssh_options ${ssh_user}@$srcHost "$mysql $mysql_credential_args -N -s -A -e\"SELECT DISTINCT CONCAT('CREATE USER IF NOT EXISTS ''',user,'''@''localhost'' IDENTIFIED WITH mysql_native_password AS ''',password,'''; ') FROM mysql.user WHERE user<>'' AND user <> 'root' AND user <> 'sys-maint' AND user <> 'debian-sys-maint' AND user <> 'backup' AND user <> 'mysql.sys' AND user <> 'mysql.session'\"" \
 						> ${_backupDestArchiveDir}/MySQLCreateUser-for-MySQL-5.7.sql-${filedate}.sql 2> $err_Log
 						exit $?
 					)
 					retval=$?
             else
 					$(
-						$ssh $ssh_options ${ssh_user}@$srcHost "$mysql -u$mysql_user -p$mysql_password -N -s -A -e\"SELECT DISTINCT CONCAT('CREATE USER ''',user,'''@''localhost'' IDENTIFIED WITH mysql_native_password AS ''',password,'''; ') FROM mysql.user WHERE user<>'' AND user <> 'root' AND user <> 'sys-maint' AND user <> 'debian-sys-maint' AND user <> 'backup' AND user <> 'mysql.sys' AND user <> 'mysql.session'\"" \
+						$ssh $ssh_options ${ssh_user}@$srcHost "$mysql -u$mysql_user -p$mysql_password -N -s -A -e\"SELECT DISTINCT CONCAT('CREATE USER IF NOT EXISTS ''',user,'''@''localhost'' IDENTIFIED WITH mysql_native_password AS ''',password,'''; ') FROM mysql.user WHERE user<>'' AND user <> 'root' AND user <> 'sys-maint' AND user <> 'debian-sys-maint' AND user <> 'backup' AND user <> 'mysql.sys' AND user <> 'mysql.session'\"" \
 						> ${_backupDestArchiveDir}/MySQLCreateUser-for-MySQL-5.7.sql-${filedate}.sql 2> $err_Log
 						exit $?
 					)
@@ -515,14 +515,14 @@ if $ARCHIVE ;then
          else
 				if [ -n "$mysql_credential_args" ] ; then
 					$(
-						$mysql $mysql_credential_args -N -s -A -e"SELECT DISTINCT CONCAT('CREATE USER ''',user,'''@''localhost'' IDENTIFIED WITH mysql_native_password AS ''',password,'''; ') FROM mysql.user WHERE user<>'' AND user <> 'root' AND user <> 'sys-maint' AND user <> 'debian-sys-maint' AND user <> 'backup' AND user <> 'mysql.sys' AND user <> 'mysql.session'" \
+                  $mysql $mysql_credential_args -N -s -A -e"SELECT DISTINCT CONCAT('CREATE USER IF NOT EXISTS ''',user,'''@''localhost'' IDENTIFIED WITH mysql_native_password AS ''',password,'''; ') FROM mysql.user WHERE user<>'' AND user <> 'root' AND user <> 'sys-maint' AND user <> 'debian-sys-maint' AND user <> 'backup' AND user <> 'mysql.sys' AND user <> 'mysql.session'" \
 						> ${_backupDestArchiveDir}/MySQLCreateUser-for-MySQL-5.7.sql-${filedate}.sql 2> $err_Log
 						exit $?
 					)
 					retval=$?
             else
 					$(
-						$mysql -u$mysql_user -p$mysql_password -N -s -A -e"SELECT DISTINCT CONCAT('CREATE USER ''',user,'''@''localhost'' IDENTIFIED WITH mysql_native_password AS ''',password,'''; ') FROM mysql.user WHERE user<>'' AND user <> 'root' AND user <> 'sys-maint' AND user <> 'debian-sys-maint' AND user <> 'backup' AND user <> 'mysql.sys' AND user <> 'mysql.session'" \
+						$mysql -u$mysql_user -p$mysql_password -N -s -A -e"SELECT DISTINCT CONCAT('CREATE USER IF NOT EXISTS ''',user,'''@''localhost'' IDENTIFIED WITH mysql_native_password AS ''',password,'''; ') FROM mysql.user WHERE user<>'' AND user <> 'root' AND user <> 'sys-maint' AND user <> 'debian-sys-maint' AND user <> 'backup' AND user <> 'mysql.sys' AND user <> 'mysql.session'" \
 						> ${_backupDestArchiveDir}/MySQLCreateUser-for-MySQL-5.7.sql-${filedate}.sql 2> $err_Log
 						exit $?
 					)
@@ -721,7 +721,7 @@ if $ARCHIVE ;then
       if [ $srcHost != "localhost" ] || $_via_ssh_tunnel ;then
          if [ -n "$mysql_credential_args" ] ; then
             $(
-               $ssh $ssh_options ${ssh_user}@$srcHost "$mysql $mysql_credential_args -N -s -A -e\"SELECT DISTINCT CONCAT('CREATE USER ''',user,'''@''localhost'' IDENTIFIED WITH mysql_native_password ; UPDATE user SET authentication_string = ''',password,''' WHERE user = ''',user,'''; FLUSH PRIVILEGES;') FROM mysql.user WHERE user<>'' AND user <> 'root' AND user <> 'sys-maint' AND user <> 'debian-sys-maint' AND user <> 'backup' AND user <> 'mysql.sys' AND user <> 'mysql.session'\"" \
+               $ssh $ssh_options ${ssh_user}@$srcHost "$mysql $mysql_credential_args -N -s -A -e\"SELECT DISTINCT CONCAT('CREATE USER IF NOT EXISTS ''',user,'''@''localhost'' IDENTIFIED WITH mysql_native_password ; UPDATE user SET authentication_string = ''',password,''' WHERE user = ''',user,'''; FLUSH PRIVILEGES;') FROM mysql.user WHERE user<>'' AND user <> 'root' AND user <> 'sys-maint' AND user <> 'debian-sys-maint' AND user <> 'backup' AND user <> 'mysql.sys' AND user <> 'mysql.session'\"" \
                   > ${_backupDestArchiveDir}/MySQLCreateUser-for-MySQL-5.7..sql-${filedate}.sql 2> $err_Log
                exit $?
             )
@@ -737,14 +737,14 @@ if $ARCHIVE ;then
       else
          if [ -n "$mysql_credential_args" ] ; then
             $(
-               $mysql $mysql_credential_args -N -s -A -e"SELECT DISTINCT CONCAT('CREATE USER ''',user,'''@''localhost'' IDENTIFIED WITH mysql_native_password ; UPDATE user SET authentication_string = ''',password,''' WHERE user = ''',user,'''; FLUSH PRIVILEGES;') FROM mysql.user WHERE user<>'' AND user <> 'root' AND user <> 'sys-maint' AND user <> 'debian-sys-maint' AND user <> 'backup' AND user <> 'mysql.sys' AND user <> 'mysql.session'" \
+               $mysql $mysql_credential_args -N -s -A -e"SELECT DISTINCT CONCAT('CREATE USER IF NOT EXISTS ''',user,'''@''localhost'' IDENTIFIED WITH mysql_native_password ; UPDATE user SET authentication_string = ''',password,''' WHERE user = ''',user,'''; FLUSH PRIVILEGES;') FROM mysql.user WHERE user<>'' AND user <> 'root' AND user <> 'sys-maint' AND user <> 'debian-sys-maint' AND user <> 'backup' AND user <> 'mysql.sys' AND user <> 'mysql.session'" \
                   > ${_backupDestArchiveDir}/MySQLCreateUser-for-MySQL-5.7..sql-${filedate}.sql 2> $err_Log
                exit $?
             )
             retval=$?
          else
             $(
-               $mysql -u$mysql_user -p$mysql_password -N -s -A -e"SELECT DISTINCT CONCAT('CREATE USER ''',user,'''@''localhost'' IDENTIFIED WITH mysql_native_password ; UPDATE user SET authentication_string = ''',password,''' WHERE user = ''',user,'''; FLUSH PRIVILEGES;') FROM mysql.user WHERE user<>'' AND user <> 'root' AND user <> 'sys-maint' AND user <> 'debian-sys-maint' AND user <> 'backup' AND user <> 'mysql.sys' AND user <> 'mysql.session'" \
+               $mysql -u$mysql_user -p$mysql_password -N -s -A -e"SELECT DISTINCT CONCAT('CREATE USER IF NOT EXISTS ''',user,'''@''localhost'' IDENTIFIED WITH mysql_native_password ; UPDATE user SET authentication_string = ''',password,''' WHERE user = ''',user,'''; FLUSH PRIVILEGES;') FROM mysql.user WHERE user<>'' AND user <> 'root' AND user <> 'sys-maint' AND user <> 'debian-sys-maint' AND user <> 'backup' AND user <> 'mysql.sys' AND user <> 'mysql.session'" \
                   > ${_backupDestArchiveDir}/MySQLCreateUser-for-MySQL-5.7..sql-${filedate}.sql 2> $err_Log
                exit $?
             )