diff --git a/scripts/db_migrator.py b/scripts/db_migrator.py
index 369f78f9a9..4d0cdabc4b 100755
--- a/scripts/db_migrator.py
+++ b/scripts/db_migrator.py
@@ -636,6 +636,20 @@ def update_edgezone_aggregator_config(self):
                 # Set new cable length values
                 self.configDB.set(self.configDB.CONFIG_DB, "CABLE_LENGTH|AZURE", intf, EDGEZONE_AGG_CABLE_LENGTH)
 
+    def migrate_config_db_flex_counter_delay_status(self):
+        """
+        Migrate "FLEX_COUNTER_TABLE|*": { "value": { "FLEX_COUNTER_DELAY_STATUS": "false" } }
+        Set FLEX_COUNTER_DELAY_STATUS true in case of fast-reboot
+        """
+
+        flex_counter_objects = self.configDB.get_keys('FLEX_COUNTER_TABLE')
+        for obj in flex_counter_objects:
+            flex_counter = self.configDB.get_entry('FLEX_COUNTER_TABLE', obj)
+            delay_status = flex_counter.get('FLEX_COUNTER_DELAY_STATUS')
+            if delay_status is None or delay_status == 'false':
+                flex_counter['FLEX_COUNTER_DELAY_STATUS'] = 'true'
+                self.configDB.mod_entry('FLEX_COUNTER_TABLE', obj, flex_counter)
+
     def version_unknown(self):
         """
         version_unknown tracks all SONiC versions that doesn't have a version
@@ -885,9 +899,22 @@ def version_3_0_5(self):
 
     def version_3_0_6(self):
         """
-        Current latest version. Nothing to do here.
+        Version 3_0_6
         """
         log.log_info('Handling version_3_0_6')
+
+        if self.stateDB.keys(self.stateDB.STATE_DB, "FAST_REBOOT|system"):
+            self.migrate_config_db_flex_counter_delay_status()
+
+        self.set_version('version_3_0_7')
+        return 'version_3_0_7'
+
+    def version_3_0_7(self):
+        """
+        Version 3_0_7
+        Current latest version. Nothing to do here.
+        """
+        log.log_info('Handling version_3_0_7')
         return None
 
     def get_version(self):
diff --git a/tests/db_migrator_input/config_db/cross_branch_upgrade_to_3_0_7_expected.json b/tests/db_migrator_input/config_db/cross_branch_upgrade_to_3_0_7_expected.json
new file mode 100644
index 0000000000..046eba7768
--- /dev/null
+++ b/tests/db_migrator_input/config_db/cross_branch_upgrade_to_3_0_7_expected.json
@@ -0,0 +1,19 @@
+{
+    "VERSIONS|DATABASE": {
+        "VERSION": "version_3_0_7"
+    },
+    "FLEX_COUNTER_TABLE|ACL": {
+        "FLEX_COUNTER_STATUS": "true",
+        "FLEX_COUNTER_DELAY_STATUS": "true",
+        "POLL_INTERVAL": "10000"
+    },
+    "FLEX_COUNTER_TABLE|QUEUE": {
+        "FLEX_COUNTER_STATUS": "true",
+        "FLEX_COUNTER_DELAY_STATUS": "true",
+        "POLL_INTERVAL": "10000"
+    },
+    "FLEX_COUNTER_TABLE|PG_WATERMARK": {
+        "FLEX_COUNTER_STATUS": "false",
+        "FLEX_COUNTER_DELAY_STATUS": "true"
+    }
+}
diff --git a/tests/db_migrator_input/config_db/cross_branch_upgrade_to_3_0_7_input.json b/tests/db_migrator_input/config_db/cross_branch_upgrade_to_3_0_7_input.json
new file mode 100644
index 0000000000..07ce763683
--- /dev/null
+++ b/tests/db_migrator_input/config_db/cross_branch_upgrade_to_3_0_7_input.json
@@ -0,0 +1,18 @@
+{
+    "VERSIONS|DATABASE": {
+        "VERSION": "version_1_0_1"
+    },
+    "FLEX_COUNTER_TABLE|ACL": {
+        "FLEX_COUNTER_STATUS": "true",
+        "FLEX_COUNTER_DELAY_STATUS": "true",
+        "POLL_INTERVAL": "10000"
+    },
+    "FLEX_COUNTER_TABLE|QUEUE": {
+        "FLEX_COUNTER_STATUS": "true",
+        "FLEX_COUNTER_DELAY_STATUS": "false",
+        "POLL_INTERVAL": "10000"
+    },
+    "FLEX_COUNTER_TABLE|PG_WATERMARK": {
+        "FLEX_COUNTER_STATUS": "false"
+    }
+}
diff --git a/tests/db_migrator_input/state_db/fast_reboot_upgrade.json b/tests/db_migrator_input/state_db/fast_reboot_upgrade.json
new file mode 100644
index 0000000000..463dd89e73
--- /dev/null
+++ b/tests/db_migrator_input/state_db/fast_reboot_upgrade.json
@@ -0,0 +1,5 @@
+{
+    "FAST_REBOOT|system": {
+        "enable": "true"
+    }
+}
diff --git a/tests/db_migrator_test.py b/tests/db_migrator_test.py
index c4b17a3d13..f8dba840e6 100644
--- a/tests/db_migrator_test.py
+++ b/tests/db_migrator_test.py
@@ -584,3 +584,38 @@ def test_warm_upgrade_t0_edgezone_aggregator_same_cable_length(self):
 
         diff = DeepDiff(resulting_table, expected_table, ignore_order=True)
         assert not diff
+
+
+class TestFastUpgrade_to_3_0_7(object):
+    @classmethod
+    def setup_class(cls):
+        os.environ['UTILITIES_UNIT_TESTING'] = "2"
+        cls.config_db_tables_to_verify = ['FLEX_COUNTER_TABLE']
+        dbconnector.dedicated_dbs['STATE_DB'] = os.path.join(mock_db_path, 'state_db', 'fast_reboot_upgrade')
+
+    @classmethod
+    def teardown_class(cls):
+        os.environ['UTILITIES_UNIT_TESTING'] = "0"
+        dbconnector.dedicated_dbs['CONFIG_DB'] = None
+        dbconnector.dedicated_dbs['STATE_DB'] = None
+
+    def mock_dedicated_config_db(self, filename):
+        jsonfile = os.path.join(mock_db_path, 'config_db', filename)
+        dbconnector.dedicated_dbs['CONFIG_DB'] = jsonfile
+        db = Db()
+        return db
+
+    def check_config_db(self, result, expected):
+        for table in self.config_db_tables_to_verify:
+            assert result.get_table(table) == expected.get_table(table)
+
+    def test_fast_reboot_upgrade_to_3_0_7(self):
+        db_before_migrate = 'cross_branch_upgrade_to_3_0_7_input'
+        db_after_migrate = 'cross_branch_upgrade_to_3_0_7_expected'
+        device_info.get_sonic_version_info = get_sonic_version_info_mlnx
+        db = self.mock_dedicated_config_db(db_before_migrate)
+        import db_migrator
+        dbmgtr = db_migrator.DBMigrator(None)
+        dbmgtr.migrate()
+        expected_db = self.mock_dedicated_config_db(db_after_migrate)
+        assert not self.check_config_db(dbmgtr.configDB, expected_db.cfgdb)