diff --git a/scripts/db_migrator.py b/scripts/db_migrator.py
index ddd1290767..04e0dbcb4b 100755
--- a/scripts/db_migrator.py
+++ b/scripts/db_migrator.py
@@ -44,7 +44,7 @@ def __init__(self, namespace, socket=None):
                      none-zero values.
               build: sequentially increase within a minor version domain.
         """
-        self.CURRENT_VERSION = 'version_3_0_6'
+        self.CURRENT_VERSION = 'version_3_0_5'
 
         self.TABLE_NAME      = 'VERSIONS'
         self.TABLE_KEY       = 'DATABASE'
@@ -617,13 +617,13 @@ def version_1_0_6(self):
             abandon_method = self.mellanox_buffer_migrator.mlnx_abandon_pending_buffer_configuration
             append_method = self.mellanox_buffer_migrator.mlnx_append_item_on_pending_configuration_list
 
-            if self.mellanox_buffer_migrator.mlnx_migrate_buffer_pool_size('version_1_0_6', 'version_3_0_0') \
-               and self.mellanox_buffer_migrator.mlnx_migrate_buffer_profile('version_1_0_6', 'version_3_0_0') \
+            if self.mellanox_buffer_migrator.mlnx_migrate_buffer_pool_size('version_1_0_6', 'version_2_0_0') \
+               and self.mellanox_buffer_migrator.mlnx_migrate_buffer_profile('version_1_0_6', 'version_2_0_0') \
                and (not self.mellanox_buffer_migrator.mlnx_is_buffer_model_dynamic() or \
                     self.migrate_config_db_buffer_tables_for_dynamic_calculation(speed_list, cable_len_list, '0', abandon_method, append_method)) \
                and self.mellanox_buffer_migrator.mlnx_flush_new_buffer_configuration() \
                and self.prepare_dynamic_buffer_for_warm_reboot(buffer_pools, buffer_profiles, buffer_pgs):
-                self.set_version('version_3_0_0')
+                self.set_version('version_2_0_0')
         else:
             self.prepare_dynamic_buffer_for_warm_reboot()
 
@@ -632,8 +632,26 @@ def version_1_0_6(self):
             self.configDB.set_entry('DEVICE_METADATA', 'localhost', metadata)
             log.log_notice('Setting buffer_model to traditional')
 
-            self.set_version('version_3_0_0')
+            self.set_version('version_2_0_0')
 
+        return 'version_2_0_0'
+
+    def version_2_0_0(self):
+        """
+        Version 2_0_0
+        """
+        log.log_info('Handling version_2_0_0')
+        self.migrate_port_qos_map_global()
+        self.set_version('version_2_0_1')
+        return 'version_2_0_1'
+
+    def version_2_0_1(self):
+        """
+        Version 2_0_1.
+        This is the latest version for 202012 branch 
+        """
+        log.log_info('Handling version_2_0_1')
+        self.set_version('version_3_0_0')
         return 'version_3_0_0'
 
     def version_3_0_0(self):
@@ -694,21 +712,14 @@ def version_3_0_4(self):
             if 'pfc_enable' in v:
                 v['pfcwd_sw_enable'] = v['pfc_enable']
                 self.configDB.set_entry('PORT_QOS_MAP', k, v)
+        self.set_version('version_3_0_5')
         return 'version_3_0_5'
 
     def version_3_0_5(self):
-        """
-        Version 3_0_5
-        """
-        log.log_info('Handling version_3_0_5')
-        self.migrate_port_qos_map_global()
-        return 'version_3_0_6'
-
-    def version_3_0_6(self):
         """
         Current latest version. Nothing to do here.
         """
-        log.log_info('Handling version_3_0_6')
+        log.log_info('Handling version_3_0_5')
         return None
 
     def get_version(self):
diff --git a/scripts/mellanox_buffer_migrator.py b/scripts/mellanox_buffer_migrator.py
index bc5c7cab16..6706969be1 100755
--- a/scripts/mellanox_buffer_migrator.py
+++ b/scripts/mellanox_buffer_migrator.py
@@ -480,8 +480,8 @@ def __init__(self, configDB, appDB, stateDB):
                                   "spc2_3800-d24c52_t1_pool_shp", "spc2_3800-d28c50_t1_pool_shp"],
             }
         },
-        "version_3_0_0": {
-            # Version 3.0.0 is introduced for dynamic buffer calculation
+        "version_2_0_0": {
+            # Version 2.0.0 is introduced for dynamic buffer calculation
             #
             "pool_mapped_from_old_version": {
                 "spc1_t0_pool": "spc1_pool",
diff --git a/tests/db_migrator_input/config_db/qos_map_table_expected.json b/tests/db_migrator_input/config_db/qos_map_table_expected.json
index e75740f02c..47381ec550 100644
--- a/tests/db_migrator_input/config_db/qos_map_table_expected.json
+++ b/tests/db_migrator_input/config_db/qos_map_table_expected.json
@@ -3,32 +3,32 @@
         "VERSION": "version_3_0_5"
     },
     "PORT_QOS_MAP|Ethernet0": {
-        "dscp_to_tc_map": "[DSCP_TO_TC_MAP|AZURE]",
+        "dscp_to_tc_map": "AZURE",
         "pfc_enable": "3,4",
         "pfcwd_sw_enable": "3,4",
-        "pfc_to_queue_map": "[MAP_PFC_PRIORITY_TO_QUEUE|AZURE]",
-        "tc_to_pg_map": "[TC_TO_PRIORITY_GROUP_MAP|AZURE]",
-        "tc_to_queue_map": "[TC_TO_QUEUE_MAP|AZURE]"
+        "pfc_to_queue_map": "AZURE",
+        "tc_to_pg_map": "AZURE",
+        "tc_to_queue_map": "AZURE"
     },
     "PORT_QOS_MAP|Ethernet100": {
-        "dscp_to_tc_map": "[DSCP_TO_TC_MAP|AZURE]",
+        "dscp_to_tc_map": "AZURE",
         "pfc_enable": "3,4",
         "pfcwd_sw_enable": "3,4",
-        "pfc_to_queue_map": "[MAP_PFC_PRIORITY_TO_QUEUE|AZURE]",
-        "tc_to_pg_map": "[TC_TO_PRIORITY_GROUP_MAP|AZURE]",
-        "tc_to_queue_map": "[TC_TO_QUEUE_MAP|AZURE]"
+        "pfc_to_queue_map": "AZURE",
+        "tc_to_pg_map": "AZURE",
+        "tc_to_queue_map": "AZURE"
     },
     "PORT_QOS_MAP|Ethernet92": {
-        "dscp_to_tc_map": "[DSCP_TO_TC_MAP|AZURE]",
-        "pfc_to_queue_map": "[MAP_PFC_PRIORITY_TO_QUEUE|AZURE]",
-        "tc_to_pg_map": "[TC_TO_PRIORITY_GROUP_MAP|AZURE]",
-        "tc_to_queue_map": "[TC_TO_QUEUE_MAP|AZURE]"
+        "dscp_to_tc_map": "AZURE",
+        "pfc_to_queue_map": "AZURE",
+        "tc_to_pg_map": "AZURE",
+        "tc_to_queue_map": "AZURE"
     },
     "PORT_QOS_MAP|Ethernet96": {
-        "dscp_to_tc_map": "[DSCP_TO_TC_MAP|AZURE]",
-        "pfc_to_queue_map": "[MAP_PFC_PRIORITY_TO_QUEUE|AZURE]",
-        "tc_to_pg_map": "[TC_TO_PRIORITY_GROUP_MAP|AZURE]",
-        "tc_to_queue_map": "[TC_TO_QUEUE_MAP|AZURE]"
+        "dscp_to_tc_map": "AZURE",
+        "pfc_to_queue_map": "AZURE",
+        "tc_to_pg_map": "AZURE",
+        "tc_to_queue_map": "AZURE"
     }
 }
 
diff --git a/tests/db_migrator_input/config_db/qos_map_table_global_expected.json b/tests/db_migrator_input/config_db/qos_map_table_global_expected.json
index c7fea9c013..db2096144f 100644
--- a/tests/db_migrator_input/config_db/qos_map_table_global_expected.json
+++ b/tests/db_migrator_input/config_db/qos_map_table_global_expected.json
@@ -1,6 +1,6 @@
 {
     "VERSIONS|DATABASE": {
-        "VERSION": "version_3_0_6"
+        "VERSION": "version_2_0_1"
     },
     "DSCP_TO_TC_MAP|AZURE": {
         "0": "0",
diff --git a/tests/db_migrator_input/config_db/qos_map_table_global_input.json b/tests/db_migrator_input/config_db/qos_map_table_global_input.json
index 0ca51a4525..dd4b78bb0e 100644
--- a/tests/db_migrator_input/config_db/qos_map_table_global_input.json
+++ b/tests/db_migrator_input/config_db/qos_map_table_global_input.json
@@ -1,6 +1,6 @@
 {
     "VERSIONS|DATABASE": {
-        "VERSION": "version_3_0_5"
+        "VERSION": "version_2_0_0"
     },
     "DSCP_TO_TC_MAP|AZURE": {
         "0": "0",
diff --git a/tests/db_migrator_input/config_db/qos_map_table_input.json b/tests/db_migrator_input/config_db/qos_map_table_input.json
index 4bb237588a..c62e293daf 100644
--- a/tests/db_migrator_input/config_db/qos_map_table_input.json
+++ b/tests/db_migrator_input/config_db/qos_map_table_input.json
@@ -3,29 +3,29 @@
         "VERSION": "version_3_0_4"
     },
     "PORT_QOS_MAP|Ethernet0": {
-        "dscp_to_tc_map": "[DSCP_TO_TC_MAP|AZURE]",
+        "dscp_to_tc_map": "AZURE",
         "pfc_enable": "3,4",
-        "pfc_to_queue_map": "[MAP_PFC_PRIORITY_TO_QUEUE|AZURE]",
-        "tc_to_pg_map": "[TC_TO_PRIORITY_GROUP_MAP|AZURE]",
-        "tc_to_queue_map": "[TC_TO_QUEUE_MAP|AZURE]"
+        "pfc_to_queue_map": "AZURE",
+        "tc_to_pg_map": "AZURE",
+        "tc_to_queue_map": "AZURE"
     },
     "PORT_QOS_MAP|Ethernet100": {
-        "dscp_to_tc_map": "[DSCP_TO_TC_MAP|AZURE]",
+        "dscp_to_tc_map": "AZURE",
         "pfc_enable": "3,4",
-        "pfc_to_queue_map": "[MAP_PFC_PRIORITY_TO_QUEUE|AZURE]",
-        "tc_to_pg_map": "[TC_TO_PRIORITY_GROUP_MAP|AZURE]",
-        "tc_to_queue_map": "[TC_TO_QUEUE_MAP|AZURE]"
+        "pfc_to_queue_map": "AZURE",
+        "tc_to_pg_map": "AZURE",
+        "tc_to_queue_map": "AZURE"
     },
     "PORT_QOS_MAP|Ethernet92": {
-        "dscp_to_tc_map": "[DSCP_TO_TC_MAP|AZURE]",
-        "pfc_to_queue_map": "[MAP_PFC_PRIORITY_TO_QUEUE|AZURE]",
-        "tc_to_pg_map": "[TC_TO_PRIORITY_GROUP_MAP|AZURE]",
-        "tc_to_queue_map": "[TC_TO_QUEUE_MAP|AZURE]"
+        "dscp_to_tc_map": "AZURE",
+        "pfc_to_queue_map": "AZURE",
+        "tc_to_pg_map": "AZURE",
+        "tc_to_queue_map": "AZURE"
     },
     "PORT_QOS_MAP|Ethernet96": {
-        "dscp_to_tc_map": "[DSCP_TO_TC_MAP|AZURE]",
-        "pfc_to_queue_map": "[MAP_PFC_PRIORITY_TO_QUEUE|AZURE]",
-        "tc_to_pg_map": "[TC_TO_PRIORITY_GROUP_MAP|AZURE]",
-        "tc_to_queue_map": "[TC_TO_QUEUE_MAP|AZURE]"
+        "dscp_to_tc_map": "AZURE",
+        "pfc_to_queue_map": "AZURE",
+        "tc_to_pg_map": "AZURE",
+        "tc_to_queue_map": "AZURE"
     }
 }
diff --git a/tests/db_migrator_input/config_db/reclaiming-buffer-warmreboot-expected.json b/tests/db_migrator_input/config_db/reclaiming-buffer-warmreboot-expected.json
index 5037644faf..ccedec4d9d 100644
--- a/tests/db_migrator_input/config_db/reclaiming-buffer-warmreboot-expected.json
+++ b/tests/db_migrator_input/config_db/reclaiming-buffer-warmreboot-expected.json
@@ -2043,6 +2043,6 @@
         "admin_status": "up"
     },
     "VERSIONS|DATABASE": {
-        "VERSION": "version_3_0_4"
+        "VERSION": "version_3_0_5"
     }
 }