diff --git a/db_scripts/base/0010_create_bss.up b/db_scripts/base/0010_create_bss.up
index d93fb5ea..8a7e0c07 100644
--- a/db_scripts/base/0010_create_bss.up
+++ b/db_scripts/base/0010_create_bss.up
@@ -622,7 +622,7 @@ INSERT INTO `products`
             (2,NULL,'sippeering','SIP_PEERING','SIP Peering',1,NULL,NULL,NULL),
             (3,NULL,'reseller','VOIP_RESELLER','VoIP Reseller',1,NULL,NULL,NULL);
 -- the default reseller contract, will be the only one unless multitenancy is enabled
-INSERT INTO `contracts` VALUES (1,NULL,NULL,NULL,NULL,'active',now(),now(),now(),NULL);
+INSERT INTO `contracts` VALUES (1,NULL,NULL,NULL,NULL,'active','0','0','0',NULL);
 INSERT INTO `resellers` VALUES (1,1,'default','active');
 INSERT INTO `billing_mappings` VALUES (1,NULL,NULL,NULL,1,3);
 -- first administrative account, change password after first login
diff --git a/db_scripts/base/0020_create_oss.up b/db_scripts/base/0020_create_oss.up
index b5850e0b..908322c6 100644
--- a/db_scripts/base/0020_create_oss.up
+++ b/db_scripts/base/0020_create_oss.up
@@ -397,10 +397,10 @@ INSERT INTO xmlgroups (name) VALUES('appserver');
 -- internal domain and subscribers
 INSERT INTO voip_domains (domain, local) VALUES('voip.sipwise.local', true);
 INSERT INTO voip_subscribers (username, domain_id, uuid, create_timestamp)
-                       SELECT 'no_such_number', id, '9bcb88b6-541a-43da-8fdc-816f5557ff93', NOW()
+                       SELECT 'no_such_number', id, '9bcb88b6-541a-43da-8fdc-816f5557ff93', '0'
                          FROM voip_domains WHERE domain = 'voip.sipwise.local';
 INSERT INTO voip_subscribers (username, domain_id, uuid, password, create_timestamp)
-                       SELECT 'nagios', id, 'ac1697cf-6933-45ef-9abf-b1278054ded0', 'nagios4Sipwise!', NOW()
+                       SELECT 'nagios', id, 'ac1697cf-6933-45ef-9abf-b1278054ded0', 'nagios4Sipwise!', '0'
                          FROM voip_domains WHERE domain = 'voip.sipwise.local';
 
 -- kamailio preferences
diff --git a/db_scripts/base/0040_create_oss_triggers_kamailio.up b/db_scripts/base/0040_create_oss_triggers_kamailio.up
index 585a892a..f240eb6e 100644
--- a/db_scripts/base/0040_create_oss_triggers_kamailio.up
+++ b/db_scripts/base/0040_create_oss_triggers_kamailio.up
@@ -11,7 +11,7 @@ CREATE TRIGGER voip_sub_crepl_trig AFTER INSERT ON voip_subscribers
   SELECT domain INTO subscriber_domain FROM voip_domains where id = NEW.domain_id;
 
   INSERT INTO kamailio.subscriber (username, domain, uuid, timezone, password, datetime_created, ha1, ha1b)
-                   VALUES(NEW.username, subscriber_domain, NEW.uuid, NEW.timezone, NEW.password, now(),
+                   VALUES(NEW.username, subscriber_domain, NEW.uuid, NEW.timezone, NEW.password, '0',
                           MD5(CONCAT(NEW.username, ':', subscriber_domain, ':', NEW.password)),
                           MD5(CONCAT(NEW.username, '@', subscriber_domain, ':', subscriber_domain, ':', NEW.password)));
   END;
diff --git a/db_scripts/base/3972.down b/db_scripts/base/3972.down
index 507f6834..e5930fae 100644
--- a/db_scripts/base/3972.down
+++ b/db_scripts/base/3972.down
@@ -13,7 +13,7 @@ CREATE TRIGGER provisioning.voip_sub_crepl_trig AFTER INSERT ON voip_subscribers
   SELECT domain INTO subscriber_domain FROM voip_domains where id = NEW.domain_id;
 
   INSERT INTO kamailio.subscriber (username, domain, uuid, timezone, password, datetime_created, ha1, ha1b)
-                   VALUES(NEW.username, subscriber_domain, NEW.uuid, NEW.timezone, NEW.password, now(),
+                   VALUES(NEW.username, subscriber_domain, NEW.uuid, NEW.timezone, NEW.password, '0',
                           MD5(CONCAT(NEW.username, ':', subscriber_domain, ':', NEW.password)),
                           MD5(CONCAT(NEW.username, '@', subscriber_domain, ':', subscriber_domain, ':', NEW.password)));
   END;
diff --git a/db_scripts/base/3972.up b/db_scripts/base/3972.up
index 769c837a..e645a1ca 100644
--- a/db_scripts/base/3972.up
+++ b/db_scripts/base/3972.up
@@ -13,7 +13,7 @@ CREATE TRIGGER provisioning.voip_sub_crepl_trig AFTER INSERT ON voip_subscribers
   SELECT domain INTO subscriber_domain FROM voip_domains where id = NEW.domain_id;
 
   INSERT INTO kamailio.subscriber (username, domain, uuid, password, datetime_created, ha1, ha1b)
-                   VALUES(NEW.username, subscriber_domain, NEW.uuid, NEW.password, now(),
+                   VALUES(NEW.username, subscriber_domain, NEW.uuid, NEW.password, '0',
                           MD5(CONCAT(NEW.username, ':', subscriber_domain, ':', NEW.password)),
                           MD5(CONCAT(NEW.username, '@', subscriber_domain, ':', subscriber_domain, ':', NEW.password)));
   END;
diff --git a/db_scripts/base/4762.up b/db_scripts/base/4762.up
index ee85687c..c7a6854c 100644
--- a/db_scripts/base/4762.up
+++ b/db_scripts/base/4762.up
@@ -38,7 +38,7 @@ CREATE TRIGGER voip_peerpref_crepl_trig AFTER INSERT ON voip_peer_preferences
 
   INSERT INTO kamailio.peer_preferences
               (id, uuid, attribute, type, value, last_modified)
-       SELECT NEW.id, NEW.peer_host_id, attribute, type, NEW.value, NOW()
+       SELECT NEW.id, NEW.peer_host_id, attribute, type, NEW.value, '0'
          FROM provisioning.voip_preferences
         WHERE id = NEW.attribute_id;
 
@@ -50,7 +50,7 @@ CREATE TRIGGER voip_peerpref_urepl_trig AFTER UPDATE ON voip_peer_preferences
 
   UPDATE kamailio.peer_preferences pp, provisioning.voip_preferences vp
      SET pp.id = NEW.id, pp.uuid = NEW.peer_host_id, pp.type = vp.type,
-         pp.attribute = vp.attribute, pp.value = NEW.value, pp.last_modified = NOW()
+         pp.attribute = vp.attribute, pp.value = NEW.value, pp.last_modified = '0'
    WHERE pp.id = OLD.id
      AND vp.id = NEW.attribute_id;
 
diff --git a/db_scripts/base/5973.up b/db_scripts/base/5973.up
index 272661cb..399e165a 100644
--- a/db_scripts/base/5973.up
+++ b/db_scripts/base/5973.up
@@ -1,5 +1,5 @@
 USE provisioning;
 DELETE FROM provisioning.voip_domains where domain = 'voip.sipwise.local';
 INSERT INTO provisioning.voip_domains (domain) VALUES('voip.sipwise.local');
-INSERT INTO provisioning.voip_subscribers (username, domain_id, uuid, password, create_timestamp) SELECT 'no_such_number', id, '9bcb88b6-541a-43da-8fdc-816f5557ff93', MD5(RAND()), NOW() FROM voip_domains WHERE domain = 'voip.sipwise.local';
-INSERT INTO provisioning.voip_subscribers (username, domain_id, uuid, password, create_timestamp) SELECT 'nagios', id, 'ac1697cf-6933-45ef-9abf-b1278054ded0', 'nagios4Sipwise!', NOW() FROM voip_domains WHERE domain = 'voip.sipwise.local';
+INSERT INTO provisioning.voip_subscribers (username, domain_id, uuid, password, create_timestamp) SELECT 'no_such_number', id, '9bcb88b6-541a-43da-8fdc-816f5557ff93', MD5(RAND()), '0' FROM voip_domains WHERE domain = 'voip.sipwise.local';
+INSERT INTO provisioning.voip_subscribers (username, domain_id, uuid, password, create_timestamp) SELECT 'nagios', id, 'ac1697cf-6933-45ef-9abf-b1278054ded0', 'nagios4Sipwise!', '0' FROM voip_domains WHERE domain = 'voip.sipwise.local';
diff --git a/db_scripts/diff/10950.up b/db_scripts/diff/10950.up
index 926d0af6..0262f8cf 100644
--- a/db_scripts/diff/10950.up
+++ b/db_scripts/diff/10950.up
@@ -1,5 +1,5 @@
 use accounting;
 
 alter table prepaid_costs add column timestamp timestamp not null;
-update prepaid_costs set timestamp = now();
+update prepaid_costs set timestamp = '0';
 alter table prepaid_costs add key (timestamp);
diff --git a/db_scripts/diff/9086.down b/db_scripts/diff/9086.down
index 80b4ce9e..cd0ab475 100644
--- a/db_scripts/diff/9086.down
+++ b/db_scripts/diff/9086.down
@@ -37,7 +37,7 @@ FOR EACH ROW BEGIN
     SELECT domain INTO subscriber_domain FROM voip_domains where id = NEW.domain_id;
   
     INSERT INTO kamailio.subscriber (username, domain, uuid, password, datetime_created, ha1, ha1b)
-                     VALUES(NEW.username, subscriber_domain, NEW.uuid, NEW.password, now(),
+                     VALUES(NEW.username, subscriber_domain, NEW.uuid, NEW.password, '0',
                             MD5(CONCAT(NEW.username, ':', subscriber_domain, ':', NEW.password)),
                             MD5(CONCAT(NEW.username, '@', subscriber_domain, ':', subscriber_domain, ':', NEW.password)));
 
diff --git a/db_scripts/diff/9086.up b/db_scripts/diff/9086.up
index 43f21348..94f251d2 100644
--- a/db_scripts/diff/9086.up
+++ b/db_scripts/diff/9086.up
@@ -89,7 +89,7 @@ FOR EACH ROW BEGIN
     SELECT domain INTO subscriber_domain FROM voip_domains where id = NEW.domain_id;
   
     INSERT INTO kamailio.subscriber (username, domain, uuid, password, datetime_created, ha1, ha1b)
-                     VALUES(NEW.username, subscriber_domain, NEW.uuid, NEW.password, now(),
+                     VALUES(NEW.username, subscriber_domain, NEW.uuid, NEW.password, '0',
                             MD5(CONCAT(NEW.username, ':', subscriber_domain, ':', NEW.password)),
                             MD5(CONCAT(NEW.username, '@', subscriber_domain, ':', subscriber_domain, ':', NEW.password)));
 
diff --git a/db_scripts/diff/9256.up b/db_scripts/diff/9256.up
index b988e1e0..9a7f8617 100644
--- a/db_scripts/diff/9256.up
+++ b/db_scripts/diff/9256.up
@@ -1,5 +1,5 @@
 USE provisioning;
 
-INSERT INTO voip_preferences VALUES(NULL, 'outbound_socket', 0, 1, 1, 1, 1, now(), 0, 'enum', 0, 'Outbound socket to be used for SIP communication to this entity');
+INSERT INTO voip_preferences VALUES(NULL, 'outbound_socket', 0, 1, 1, 1, 1, '0', 0, 'enum', 0, 'Outbound socket to be used for SIP communication to this entity');
 SELECT last_insert_id() INTO @obs_pref_id;
 INSERT INTO voip_preferences_enum VALUES(NULL, @obs_pref_id, 'default', NULL, 1, 1, 1, 1);
diff --git a/db_scripts/diff/9303.up b/db_scripts/diff/9303.up
index 3bc96d8e..4212ef91 100644
--- a/db_scripts/diff/9303.up
+++ b/db_scripts/diff/9303.up
@@ -3,7 +3,7 @@ USE provisioning;
 INSERT INTO voip_preferences 
 (attribute, type, max_occur, usr_pref, dom_pref, peer_pref, modify_timestamp, internal, data_type, read_only, description) 
 VALUES
-('inbound_upn', 0, 1, 1, 1, 1, now(), 0, 'enum', 0, 'The SIP header field to fetch the user-provided-number from for inbound calls');
+('inbound_upn', 0, 1, 1, 1, 1, '0', 0, 'enum', 0, 'The SIP header field to fetch the user-provided-number from for inbound calls');
 SELECT last_insert_id() INTO @upn_pref_id;
 INSERT INTO voip_preferences_enum 
 (preference_id, label, value, usr_pref, dom_pref, peer_pref, default_val)
@@ -17,7 +17,7 @@ VALUES
 INSERT INTO voip_preferences 
 (attribute, type, max_occur, usr_pref, dom_pref, peer_pref, modify_timestamp, internal, data_type, read_only, description) 
 VALUES
-('inbound_npn', 0, 1, 0, 0, 1, now(), 0, 'enum', 0, 'The SIP header field to fetch the network-provided-number from for inbound calls');
+('inbound_npn', 0, 1, 0, 0, 1, '0', 0, 'enum', 0, 'The SIP header field to fetch the network-provided-number from for inbound calls');
 SELECT last_insert_id() INTO @npn_pref_id;
 INSERT INTO voip_preferences_enum 
 (preference_id, label, value, usr_pref, dom_pref, peer_pref, default_val)
diff --git a/db_scripts/diff/9312.up b/db_scripts/diff/9312.up
index f6ff6060..7306f87f 100644
--- a/db_scripts/diff/9312.up
+++ b/db_scripts/diff/9312.up
@@ -3,7 +3,7 @@ USE provisioning;
 INSERT INTO voip_preferences 
 (attribute, type, max_occur, usr_pref, dom_pref, peer_pref, modify_timestamp, internal, data_type, read_only, description) 
 VALUES
-('outbound_from_user', 0, 1, 1, 1, 1, now(), 0, 'enum', 0, 'The content to put into the From username for outbound calls');
+('outbound_from_user', 0, 1, 1, 1, 1, '0', 0, 'enum', 0, 'The content to put into the From username for outbound calls');
 SELECT last_insert_id() INTO @pref_id;
 INSERT INTO voip_preferences_enum 
 (preference_id, label, value, usr_pref, dom_pref, peer_pref, default_val)
@@ -16,7 +16,7 @@ VALUES
 INSERT INTO voip_preferences 
 (attribute, type, max_occur, usr_pref, dom_pref, peer_pref, modify_timestamp, internal, data_type, read_only, description) 
 VALUES
-('outbound_from_display', 0, 1, 1, 1, 1, now(), 0, 'enum', 0, 'The content to put into the From display-name for outbound calls');
+('outbound_from_display', 0, 1, 1, 1, 1, '0', 0, 'enum', 0, 'The content to put into the From display-name for outbound calls');
 SELECT last_insert_id() INTO @pref_id;
 INSERT INTO voip_preferences_enum 
 (preference_id, label, value, usr_pref, dom_pref, peer_pref, default_val)
@@ -30,7 +30,7 @@ VALUES
 INSERT INTO voip_preferences 
 (attribute, type, max_occur, usr_pref, dom_pref, peer_pref, modify_timestamp, internal, data_type, read_only, description) 
 VALUES
-('outbound_pai_user', 0, 1, 1, 1, 1, now(), 0, 'enum', 0, 'The content to put into the P-Asserted-Identity username for outbound calls (use "None" to not set header at all)');
+('outbound_pai_user', 0, 1, 1, 1, 1, '0', 0, 'enum', 0, 'The content to put into the P-Asserted-Identity username for outbound calls (use "None" to not set header at all)');
 SELECT last_insert_id() INTO @pref_id;
 INSERT INTO voip_preferences_enum 
 (preference_id, label, value, usr_pref, dom_pref, peer_pref, default_val)
@@ -44,7 +44,7 @@ VALUES
 INSERT INTO voip_preferences 
 (attribute, type, max_occur, usr_pref, dom_pref, peer_pref, modify_timestamp, internal, data_type, read_only, description) 
 VALUES
-('outbound_ppi_user', 0, 1, 1, 1, 1, now(), 0, 'enum', 0, 'The content to put into the P-Preferred-Identity username for outbound calls (use "None" to not set header at all)');
+('outbound_ppi_user', 0, 1, 1, 1, 1, '0', 0, 'enum', 0, 'The content to put into the P-Preferred-Identity username for outbound calls (use "None" to not set header at all)');
 SELECT last_insert_id() INTO @pref_id;
 INSERT INTO voip_preferences_enum 
 (preference_id, label, value, usr_pref, dom_pref, peer_pref, default_val)