diff --git a/src/bin/admin/tests/mysql_tests.sh.in b/src/bin/admin/tests/mysql_tests.sh.in
index 99c2bffd67..33d21c0e5d 100644
--- a/src/bin/admin/tests/mysql_tests.sh.in
+++ b/src/bin/admin/tests/mysql_tests.sh.in
@@ -847,6 +847,12 @@ insert into hosts(dhcp_identifier, dhcp_identifier_type, dhcp4_subnet_id, ipv4_a
     count=$(echo "${OUTPUT}" | grep -Fci lease6_by_expire_state)
     assert_eq 2 "${count}" "lease6_by_expire_state wrong or missing. (expected count %d, actual %d)"
 
+    # Verify preferred lifetime columns exist.
+    qry="select preferred_lifetime,min_preferred_lifetime,max_preferred_lifetime from dhcp6_client_class where name=''"
+    run_command \
+        mysql_execute "${qry}"
+    assert_eq 0 "${EXIT_CODE}" "$qry failed. dhcp6_client_classes preferred lifetime columns missing?"
+
     # Verify upgraded schema reports version 11.0
     version=$("${kea_admin}" db-version mysql -u "${db_user}" -p "${db_password}" -n "${db_name}" -d "${db_scripts_dir}")
     assert_str_eq "11.0" "${version}" "Expected kea-admin to return %s, returned value was %s"
diff --git a/src/share/database/scripts/mysql/dhcpdb_create.mysql b/src/share/database/scripts/mysql/dhcpdb_create.mysql
index 6e9311330b..b1f2de4538 100644
--- a/src/share/database/scripts/mysql/dhcpdb_create.mysql
+++ b/src/share/database/scripts/mysql/dhcpdb_create.mysql
@@ -4032,6 +4032,12 @@ ALTER TABLE lease6
     ADD CONSTRAINT fk_lease6_state FOREIGN KEY (state)
     REFERENCES lease_state (state);
 
+# Added preferred lifetime columns v6 client classes.
+ALTER TABLE dhcp6_client_class
+    ADD COLUMN preferred_lifetime INT(10) DEFAULT NULL,
+    ADD COLUMN min_preferred_lifetime INT(10) DEFAULT NULL,
+    ADD COLUMN max_preferred_lifetime INT(10) DEFAULT NULL;
+
 # Update the schema version number
 UPDATE schema_version
     SET version = '11', minor = '0';
diff --git a/src/share/database/scripts/mysql/upgrade_010_to_011.sh.in b/src/share/database/scripts/mysql/upgrade_010_to_011.sh.in
index 958380d9f9..7a484e6d3b 100644
--- a/src/share/database/scripts/mysql/upgrade_010_to_011.sh.in
+++ b/src/share/database/scripts/mysql/upgrade_010_to_011.sh.in
@@ -71,6 +71,12 @@ ALTER TABLE lease6
     ADD CONSTRAINT fk_lease6_state FOREIGN KEY (state)
     REFERENCES lease_state (state);
 
+-- Added preferred lifetime columns to v6 client classes
+ALTER TABLE dhcp6_client_class
+    ADD COLUMN preferred_lifetime INT(10) DEFAULT NULL,
+    ADD COLUMN min_preferred_lifetime INT(10) DEFAULT NULL,
+    ADD COLUMN max_preferred_lifetime INT(10) DEFAULT NULL;
+
 -- Update the schema version number
 UPDATE schema_version
     SET version = '11', minor = '0';