diff --git a/rate-o-mat.pl b/rate-o-mat.pl
index 1baabb0..2e9cf08 100755
--- a/rate-o-mat.pl
+++ b/rate-o-mat.pl
@@ -285,8 +285,7 @@ sub connect_billdbh {
 	FATAL "Error connecting to db: ".$DBI::errstr
 		unless defined($billdbh);
 	$billdbh->do('SET time_zone = ?',undef,$connection_timezone) or FATAL 'error setting connection timezone' if $connection_timezone;
-	$billdbh->do("SET SESSION binlog_format = 'STATEMENT'") or FATAL 'error setting session binlog_format';
-	INFO "Successfully connected to billing db...";
+	INFO "Successfully connected to duplication db...";
 
 }
 
@@ -300,7 +299,6 @@ sub connect_acctdbh {
 	FATAL "Error connecting to db: ".$DBI::errstr
 		unless defined($acctdbh);
 	$acctdbh->do('SET time_zone = ?',undef,$connection_timezone) or FATAL 'error setting connection timezone' if $connection_timezone;
-	$acctdbh->do("SET SESSION binlog_format = 'STATEMENT'") or FATAL 'error setting session binlog_format';
 	INFO "Successfully connected to accounting db...";
 
 }
@@ -321,7 +319,6 @@ sub connect_provdbh {
 	FATAL "Error connecting to db: ".$DBI::errstr
 		unless defined($provdbh);
 	$provdbh->do('SET time_zone = ?',undef,$connection_timezone) or FATAL 'error setting connection timezone' if $connection_timezone;
-	$provdbh->do("SET SESSION binlog_format = 'STATEMENT'") or FATAL 'error setting session binlog_format';
 	INFO "Successfully connected to provisioning db...";
 
 }
@@ -342,7 +339,6 @@ sub connect_dupdbh {
 	FATAL "Error connecting to db: ".$DBI::errstr
 		unless defined($dupdbh);
 	$dupdbh->do('SET time_zone = ?',undef,$connection_timezone) or FATAL 'error setting connection timezone' if $connection_timezone;
-	$dupdbh->do("SET SESSION binlog_format = 'STATEMENT'") or FATAL 'error setting session binlog_format';
 	INFO "Successfully connected to duplication db...";
 
 }
@@ -713,13 +709,13 @@ EOS
 	) or FATAL "Error preparing get contract balance statement: ".$billdbh->errstr;
 
 	$sth_new_cbalance = $billdbh->prepare(
-		"INSERT IGNORE INTO billing.contract_balances (".
+		"INSERT INTO billing.contract_balances (".
 		" contract_id, cash_balance, initial_cash_balance, cash_balance_interval, free_time_balance, initial_free_time_balance, free_time_balance_interval, underrun_profiles, underrun_lock, start, end".
 		") VALUES (?, ?, ?, ?, ?, ?, ?, IF(? = 0, NULL, FROM_UNIXTIME(?)), IF(? = 0, NULL, FROM_UNIXTIME(?)), FROM_UNIXTIME(?), FROM_UNIXTIME(?))"
 	) or FATAL "Error preparing create contract balance statement: ".$billdbh->errstr;
 
 	$sth_new_cbalance_infinite_future = $billdbh->prepare(
-		"INSERT IGNORE INTO billing.contract_balances (".
+		"INSERT INTO billing.contract_balances (".
 		" contract_id, cash_balance, initial_cash_balance, cash_balance_interval, free_time_balance, initial_free_time_balance, free_time_balance_interval, underrun_profiles, underrun_lock, start, end".
 		") VALUES (?, ?, ?, ?, ?, ?, ?, IF(? = 0, NULL, FROM_UNIXTIME(?)), IF(? = 0, NULL, FROM_UNIXTIME(?)), FROM_UNIXTIME(?), '9999-12-31 23:59:59')"
 	) or FATAL "Error preparing create contract balance statement: ".$billdbh->errstr;
@@ -798,7 +794,7 @@ EOS
 			"SELECT id,value FROM provisioning.voip_usr_preferences WHERE attribute_id = ? AND subscriber_id = ?"
 		) or FATAL "Error preparing get usr preference value statement: ".$provdbh->errstr;
 		$sth_create_usr_preference_value = $provdbh->prepare(
-			"INSERT IGNORE INTO provisioning.voip_usr_preferences (subscriber_id, attribute_id, value) VALUES (?, ?, ?)"
+			"INSERT INTO provisioning.voip_usr_preferences (subscriber_id, attribute_id, value) VALUES (?, ?, ?)"
 		) or FATAL "Error preparing create usr preference value statement: ".$provdbh->errstr;
 		$sth_update_usr_preference_value = $provdbh->prepare(
 			"UPDATE provisioning.voip_usr_preferences SET value = ? WHERE id = ?"
@@ -3604,7 +3600,7 @@ sub main {
 					begin_transaction($acctdbh);					
 					lock_cdr($cdr);
 					# required to avoid contract_balances duplications during catchup:
-					begin_transaction($billdbh); #,'READ COMMITTED');
+					begin_transaction($billdbh,'READ COMMITTED');
 					# row locks are released upon commit/rollback and have to cover
 					# the whole transaction. thus locking contract rows for preventing
 					# concurrent catchups will be our very first SQL statement in the