diff --git a/phpBB/phpbb/db/doctrine/connection_parameter_factory.php b/phpBB/phpbb/db/doctrine/connection_parameter_factory.php
index 740c4b82b7..90e41061fc 100644
--- a/phpBB/phpbb/db/doctrine/connection_parameter_factory.php
+++ b/phpBB/phpbb/db/doctrine/connection_parameter_factory.php
@@ -149,6 +149,7 @@ class connection_parameter_factory
 		$enrichment_tags = [
 			'pdo_mysql' => [
 				'charset' => 'UTF8',
+				'platform' => new mysql_platform(),
 			],
 			'oci8' => [
 				'charset' => 'UTF8',
diff --git a/phpBB/phpbb/db/doctrine/mysql_platform.php b/phpBB/phpbb/db/doctrine/mysql_platform.php
new file mode 100644
index 0000000000..8a2090b6d9
--- /dev/null
+++ b/phpBB/phpbb/db/doctrine/mysql_platform.php
@@ -0,0 +1,62 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\db\doctrine;
+
+use Doctrine\DBAL\Platforms\AbstractMySQLPlatform;
+use Doctrine\DBAL\Schema\TableDiff;
+
+/**
+ * MySQL specific schema handling.
+ *
+ * While adding auto_increment column to MySQL, it must be indexed.
+ * If it's indexed as primary key, it should be declared as NOT NULL
+ * because MySQL primary key columns cannot be NULL.
+ */
+class mysql_platform extends AbstractMySQLPlatform
+{
+	/**
+	 * {@inheritDoc}
+	 */
+	public function getAlterTableSQL(TableDiff $diff)
+	{
+		$sql = parent::getAlterTableSQL($diff);
+		$table = $diff->getOldTable();
+		$columns = $diff->getAddedColumns();
+
+		foreach ($columns as $column)
+		{
+			$column_name = $column->getName();
+			if (!empty($column->getAutoincrement()) && $table)
+			{
+				foreach ($sql as $i => $query)
+				{
+					if (stripos($query, "add $column_name"))
+					{
+						if (!$table->getPrimaryKey())
+						{
+							$sql[$i] = str_replace(' DEFAULT NULL', '', $sql[$i]);
+							$sql[$i] .= ' PRIMARY KEY';
+						}
+						else
+						{
+							$sql[$i] .= ", ADD KEY ($column_name)";
+						}
+					}
+				}
+			}
+		}
+
+		return $sql;
+	}
+}
diff --git a/phpBB/phpbb/db/doctrine/postgresql_platform.php b/phpBB/phpbb/db/doctrine/postgresql_platform.php
index ea637b4203..2fa226b3ab 100644
--- a/phpBB/phpbb/db/doctrine/postgresql_platform.php
+++ b/phpBB/phpbb/db/doctrine/postgresql_platform.php
@@ -18,6 +18,7 @@ use Doctrine\DBAL\Platforms\PostgreSQL94Platform;
 use Doctrine\DBAL\Schema\Index;
 use Doctrine\DBAL\Schema\Sequence;
 use Doctrine\DBAL\Schema\Table;
+use Doctrine\DBAL\Schema\TableDiff;
 use Doctrine\DBAL\Types\BigIntType;
 use Doctrine\DBAL\Types\IntegerType;
 use Doctrine\DBAL\Types\SmallIntType;
@@ -78,6 +79,36 @@ class postgresql_platform extends PostgreSQL94Platform
 		return AbstractPlatform::getDefaultValueDeclarationSQL($column);
 	}
 
+	/**
+	 * {@inheritDoc}
+	 */
+	public function getAlterTableSQL(TableDiff $diff)
+	{
+		$sql = parent::getAlterTableSQL($diff);
+		$table_name = $diff->getOldTable()->getName();
+		$columns = $diff->getAddedColumns();
+		$post_sql = $sequence_sql = [];
+
+		foreach ($columns as $column)
+		{
+			$column_name = $column->getName();
+			if (!empty($column->getAutoincrement()))
+			{
+				$sequence = new Sequence($this->getIdentitySequenceName($table_name, $column_name));
+				$sequence_sql[] = $this->getCreateSequenceSQL($sequence);
+				$post_sql[] = 'ALTER SEQUENCE '.$sequence->getName().' OWNED BY ' . $table_name . '.' . $column_name;
+			}
+		}
+		$sql = array_merge($sequence_sql, $sql, $post_sql);
+
+		foreach ($sql as $i => $query)
+		{
+			$sql[$i] = str_replace('{{placeholder_sequence}}', "nextval('{$table_name}_seq')", $query);
+		}
+
+		return $sql;
+	}
+
 	/**
 	 * {@inheritDoc}
 	 */
diff --git a/phpBB/phpbb/db/migration/data/v400/remove_jabber.php b/phpBB/phpbb/db/migration/data/v400/remove_jabber.php
index 12759f5f47..34c4c6a355 100644
--- a/phpBB/phpbb/db/migration/data/v400/remove_jabber.php
+++ b/phpBB/phpbb/db/migration/data/v400/remove_jabber.php
@@ -101,15 +101,11 @@ class remove_jabber extends migration
 		];
 	}
 
-	public function move_jabber_to_email_notifications(int|null $start)
+	public function move_jabber_to_email_notifications()
 	{
-		$limit = 1000;
-
 		$sql = 'UPDATE ' . $this->tables['user_notifications'] . '
 			SET ' . $this->db->sql_build_array('UPDATE', ['method' => 'notification.method.email']) . "
 			WHERE method = 'notification.method.jabber'";
-		$this->db->sql_query_limit($sql, $limit, $start ?: 0);
-
-		return $this->db->sql_affectedrows() < $limit ? true : $start + $limit;
+		$this->db->sql_query($sql);
 	}
 }
diff --git a/tests/dbal/migration/schema_add_autoincrement.php b/tests/dbal/migration/schema_add_autoincrement.php
new file mode 100644
index 0000000000..4e3ecff183
--- /dev/null
+++ b/tests/dbal/migration/schema_add_autoincrement.php
@@ -0,0 +1,43 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+class schema_add_autoincrement extends \phpbb\db\migration\migration
+{
+	function update_schema()
+	{
+		return [
+			'add_tables' => [
+				$this->table_prefix . 'noid' => [
+					'COLUMNS' => [
+						'text' => ['VCHAR:50', ''],
+					],
+				],
+			],
+
+			'add_columns' => [
+				$this->table_prefix . 'noid' => [
+					'id' => ['UINT:3', null, 'auto_increment'],
+				],
+			],
+		];
+	}
+
+	function revert_schema()
+	{
+		return [
+			'drop_tables'	=> [
+				$this->table_prefix . 'noid',
+			],
+		];
+	}
+}
diff --git a/tests/dbal/migrator_test.php b/tests/dbal/migrator_test.php
index f4b80fc5e9..284c52a07c 100644
--- a/tests/dbal/migrator_test.php
+++ b/tests/dbal/migrator_test.php
@@ -25,6 +25,7 @@ require_once __DIR__ . '/migration/fail.php';
 require_once __DIR__ . '/migration/installed.php';
 require_once __DIR__ . '/migration/schema.php';
 require_once __DIR__ . '/migration/schema_index.php';
+require_once __DIR__ . '/migration/schema_add_autoincrement.php';
 
 class phpbb_dbal_migrator_test extends phpbb_database_test_case
 {
@@ -502,4 +503,24 @@ class phpbb_dbal_migrator_test extends phpbb_database_test_case
 			}
 		}
 	}
+
+	public function test_add_autoincrement_column()
+	{
+		$this->migrator->set_migrations(['schema_add_autoincrement']);
+
+		while (!$this->migrator->finished())
+		{
+			$this->migrator->update();
+		}
+
+		$this->assertTrue($this->db_tools->sql_table_exists('phpbb_noid'));
+		$this->assertTrue($this->db_tools->sql_column_exists('phpbb_noid', 'id'));
+
+		while ($this->migrator->migration_state('schema_add_autoincrement'))
+		{
+			$this->migrator->revert('schema_add_autoincrement');
+		}
+
+		$this->assertFalse($this->db_tools->sql_table_exists('phpbb_noid'));
+	}
 }