diff --git a/.github/workflows/website-schema.yml b/.github/workflows/website-schema.yml
new file mode 100644
index 0000000000..e251588e5d
--- /dev/null
+++ b/.github/workflows/website-schema.yml
@@ -0,0 +1,21 @@
+
+name: "Website config validation"
+
+on:
+  pull_request:
+    branches:
+      - "*.x"
+    paths:
+      - ".doctrine-project.json"
+      - ".github/workflows/website-schema.yml"
+  push:
+    branches:
+      - "*.x"
+    paths:
+      - ".doctrine-project.json"
+      - ".github/workflows/website-schema.yml"
+
+jobs:
+  json-validate:
+    name: "Validate JSON schema"
+    uses: "doctrine/.github/.github/workflows/website-schema.yml@7.1.0"
diff --git a/UPGRADE.md b/UPGRADE.md
index 1ee3467175..1b1c83a7c3 100644
--- a/UPGRADE.md
+++ b/UPGRADE.md
@@ -112,7 +112,8 @@ The `Sequence::isAutoIncrementsFor()` method has been deprecated.
 
 ## Deprecated using invalid database object names
 
-Using the following objects with an empty name is deprecated: `Column`, `View`, `Sequence`, `Identifier`.
+Using the following objects with an empty name is deprecated: `Table`, `Column`, `Index`, `View`, `Sequence`,
+`Identifier`.
 
 Using the following objects with a qualified name is deprecated: `Column`, `ForeignKeyConstraint`, `Index`, `Schema`,
 `UniqueConstraint`. If the object name contains a dot, the name should be quoted.
diff --git a/src/Platforms/AbstractMySQLPlatform.php b/src/Platforms/AbstractMySQLPlatform.php
index 5b70a14ae9..d44975e4bf 100644
--- a/src/Platforms/AbstractMySQLPlatform.php
+++ b/src/Platforms/AbstractMySQLPlatform.php
@@ -230,21 +230,21 @@ protected function _getCreateTableSQL(string $name, array $columns, array $optio
     {
         $queryFields = $this->getColumnDeclarationListSQL($columns);
 
-        if (isset($options['uniqueConstraints']) && ! empty($options['uniqueConstraints'])) {
+        if (! empty($options['uniqueConstraints'])) {
             foreach ($options['uniqueConstraints'] as $definition) {
                 $queryFields .= ', ' . $this->getUniqueConstraintDeclarationSQL($definition);
             }
         }
 
         // add all indexes
-        if (isset($options['indexes']) && ! empty($options['indexes'])) {
+        if (! empty($options['indexes'])) {
             foreach ($options['indexes'] as $definition) {
                 $queryFields .= ', ' . $this->getIndexDeclarationSQL($definition);
             }
         }
 
         // attach all primary keys
-        if (isset($options['primary']) && ! empty($options['primary'])) {
+        if (! empty($options['primary'])) {
             $keyColumns   = array_unique(array_values($options['primary']));
             $queryFields .= ', PRIMARY KEY(' . implode(', ', $keyColumns) . ')';
         }
diff --git a/src/Platforms/AbstractPlatform.php b/src/Platforms/AbstractPlatform.php
index ba55e6862b..be9cb5dffd 100644
--- a/src/Platforms/AbstractPlatform.php
+++ b/src/Platforms/AbstractPlatform.php
@@ -809,7 +809,7 @@ private function buildCreateTableSQL(Table $table, bool $createForeignKeys): arr
 
         foreach ($table->getIndexes() as $index) {
             if (! $index->isPrimary()) {
-                $options['indexes'][$index->getQuotedName($this)] = $index;
+                $options['indexes'][] = $index;
 
                 continue;
             }
@@ -819,7 +819,7 @@ private function buildCreateTableSQL(Table $table, bool $createForeignKeys): arr
         }
 
         foreach ($table->getUniqueConstraints() as $uniqueConstraint) {
-            $options['uniqueConstraints'][$uniqueConstraint->getQuotedName($this)] = $uniqueConstraint;
+            $options['uniqueConstraints'][] = $uniqueConstraint;
         }
 
         if ($createForeignKeys) {
@@ -961,17 +961,17 @@ protected function _getCreateTableSQL(string $name, array $columns, array $optio
     {
         $columnListSql = $this->getColumnDeclarationListSQL($columns);
 
-        if (isset($options['uniqueConstraints']) && ! empty($options['uniqueConstraints'])) {
+        if (! empty($options['uniqueConstraints'])) {
             foreach ($options['uniqueConstraints'] as $definition) {
                 $columnListSql .= ', ' . $this->getUniqueConstraintDeclarationSQL($definition);
             }
         }
 
-        if (isset($options['primary']) && ! empty($options['primary'])) {
+        if (! empty($options['primary'])) {
             $columnListSql .= ', PRIMARY KEY(' . implode(', ', array_unique(array_values($options['primary']))) . ')';
         }
 
-        if (isset($options['indexes']) && ! empty($options['indexes'])) {
+        if (! empty($options['indexes'])) {
             foreach ($options['indexes'] as $definition) {
                 $columnListSql .= ', ' . $this->getIndexDeclarationSQL($definition);
             }
@@ -1147,8 +1147,13 @@ public function getCreateSchemaSQL(string $schemaName): string
      */
     public function getCreateUniqueConstraintSQL(UniqueConstraint $constraint, string $tableName): string
     {
-        return 'ALTER TABLE ' . $tableName . ' ADD CONSTRAINT ' . $constraint->getQuotedName($this) . ' UNIQUE'
-            . ' (' . implode(', ', $constraint->getQuotedColumns($this)) . ')';
+        $sql = 'ALTER TABLE ' . $tableName . ' ADD';
+
+        if ($constraint->getName() !== '') {
+            $sql .= ' CONSTRAINT ' . $constraint->getQuotedName($this);
+        }
+
+        return $sql . ' UNIQUE (' . implode(', ', $constraint->getQuotedColumns($this)) . ')';
     }
 
     /**
@@ -1491,9 +1496,10 @@ public function getUniqueConstraintDeclarationSQL(UniqueConstraint $constraint):
             throw new InvalidArgumentException('Incomplete definition. "columns" required.');
         }
 
-        $chunks = ['CONSTRAINT'];
+        $chunks = [];
 
         if ($constraint->getName() !== '') {
+            $chunks[] = 'CONSTRAINT';
             $chunks[] = $constraint->getQuotedName($this);
         }
 
diff --git a/src/Platforms/PostgreSQLPlatform.php b/src/Platforms/PostgreSQLPlatform.php
index a860c6cafc..84fd5aa791 100644
--- a/src/Platforms/PostgreSQLPlatform.php
+++ b/src/Platforms/PostgreSQLPlatform.php
@@ -379,7 +379,7 @@ protected function _getCreateTableSQL(string $name, array $columns, array $optio
     {
         $queryFields = $this->getColumnDeclarationListSQL($columns);
 
-        if (isset($options['primary']) && ! empty($options['primary'])) {
+        if (! empty($options['primary'])) {
             $keyColumns   = array_unique(array_values($options['primary']));
             $queryFields .= ', PRIMARY KEY(' . implode(', ', $keyColumns) . ')';
         }
@@ -390,7 +390,7 @@ protected function _getCreateTableSQL(string $name, array $columns, array $optio
 
         $sql = [$query];
 
-        if (isset($options['indexes']) && ! empty($options['indexes'])) {
+        if (! empty($options['indexes'])) {
             foreach ($options['indexes'] as $index) {
                 $sql[] = $this->getCreateIndexSQL($index, $name);
             }
diff --git a/src/Platforms/SQLServerPlatform.php b/src/Platforms/SQLServerPlatform.php
index 80192ba748..fadbf70bd3 100644
--- a/src/Platforms/SQLServerPlatform.php
+++ b/src/Platforms/SQLServerPlatform.php
@@ -204,13 +204,13 @@ protected function _getCreateTableSQL(string $name, array $columns, array $optio
 
         $columnListSql = $this->getColumnDeclarationListSQL($columns);
 
-        if (isset($options['uniqueConstraints']) && ! empty($options['uniqueConstraints'])) {
+        if (! empty($options['uniqueConstraints'])) {
             foreach ($options['uniqueConstraints'] as $definition) {
                 $columnListSql .= ', ' . $this->getUniqueConstraintDeclarationSQL($definition);
             }
         }
 
-        if (isset($options['primary']) && ! empty($options['primary'])) {
+        if (! empty($options['primary'])) {
             $flags = '';
             if (isset($options['primary_index']) && $options['primary_index']->hasFlag('nonclustered')) {
                 $flags = ' NONCLUSTERED';
@@ -231,7 +231,7 @@ protected function _getCreateTableSQL(string $name, array $columns, array $optio
 
         $sql = [$query];
 
-        if (isset($options['indexes']) && ! empty($options['indexes'])) {
+        if (! empty($options['indexes'])) {
             foreach ($options['indexes'] as $index) {
                 $sql[] = $this->getCreateIndexSQL($index, $name);
             }
diff --git a/src/Platforms/SQLitePlatform.php b/src/Platforms/SQLitePlatform.php
index 6827804bef..1789b32bba 100644
--- a/src/Platforms/SQLitePlatform.php
+++ b/src/Platforms/SQLitePlatform.php
@@ -269,7 +269,7 @@ protected function _getCreateTableSQL(string $name, array $columns, array $optio
     {
         $queryFields = $this->getColumnDeclarationListSQL($columns);
 
-        if (isset($options['uniqueConstraints']) && ! empty($options['uniqueConstraints'])) {
+        if (! empty($options['uniqueConstraints'])) {
             foreach ($options['uniqueConstraints'] as $definition) {
                 $queryFields .= ', ' . $this->getUniqueConstraintDeclarationSQL($definition);
             }
@@ -296,13 +296,13 @@ protected function _getCreateTableSQL(string $name, array $columns, array $optio
             return $query;
         }
 
-        if (isset($options['indexes']) && ! empty($options['indexes'])) {
+        if (! empty($options['indexes'])) {
             foreach ($options['indexes'] as $indexDef) {
                 $query[] = $this->getCreateIndexSQL($indexDef, $name);
             }
         }
 
-        if (isset($options['unique']) && ! empty($options['unique'])) {
+        if (! empty($options['unique'])) {
             foreach ($options['unique'] as $indexDef) {
                 $query[] = $this->getCreateIndexSQL($indexDef, $name);
             }
diff --git a/src/Schema/Index.php b/src/Schema/Index.php
index 28a7469bec..591b1ac0f8 100644
--- a/src/Schema/Index.php
+++ b/src/Schema/Index.php
@@ -17,8 +17,8 @@
 use function count;
 use function strtolower;
 
-/** @extends AbstractOptionallyNamedObject<UnqualifiedName> */
-class Index extends AbstractOptionallyNamedObject
+/** @extends AbstractNamedObject<UnqualifiedName> */
+class Index extends AbstractNamedObject
 {
     /**
      * Asset identifier instances of the column names the index is associated with.
@@ -51,7 +51,7 @@ public function __construct(
         array $flags = [],
         private readonly array $options = [],
     ) {
-        parent::__construct($name);
+        parent::__construct($name ?? '');
 
         $this->_isUnique  = $isUnique || $isPrimary;
         $this->_isPrimary = $isPrimary;
diff --git a/tests/Functional/Schema/ForeignKeyConstraintTest.php b/tests/Functional/Schema/ForeignKeyConstraintTest.php
new file mode 100644
index 0000000000..49e57c299f
--- /dev/null
+++ b/tests/Functional/Schema/ForeignKeyConstraintTest.php
@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\DBAL\Tests\Functional\Schema;
+
+use Doctrine\DBAL\Schema\Column;
+use Doctrine\DBAL\Schema\ForeignKeyConstraint;
+use Doctrine\DBAL\Schema\Table;
+use Doctrine\DBAL\Tests\FunctionalTestCase;
+use Doctrine\DBAL\Types\Type;
+use Doctrine\DBAL\Types\Types;
+
+final class ForeignKeyConstraintTest extends FunctionalTestCase
+{
+    public function testUnnamedForeignKeyConstraint(): void
+    {
+        $this->dropTableIfExists('users');
+        $this->dropTableIfExists('roles');
+        $this->dropTableIfExists('teams');
+
+        $roles = new Table('roles');
+        $roles->addColumn('id', Types::INTEGER);
+        $roles->setPrimaryKey(['id']);
+
+        $teams = new Table('teams');
+        $teams->addColumn('id', Types::INTEGER);
+        $teams->setPrimaryKey(['id']);
+
+        $users = new Table('users', [
+            new Column('id', Type::getType(Types::INTEGER)),
+            new Column('role_id', Type::getType(Types::INTEGER)),
+            new Column('team_id', Type::getType(Types::INTEGER)),
+        ], [], [], [
+            new ForeignKeyConstraint(['role_id'], 'roles', ['id']),
+            new ForeignKeyConstraint(['team_id'], 'teams', ['id']),
+        ]);
+        $users->setPrimaryKey(['id']);
+
+        $sm = $this->connection->createSchemaManager();
+        $sm->createTable($roles);
+        $sm->createTable($teams);
+        $sm->createTable($users);
+
+        $table = $sm->introspectTable('users');
+
+        self::assertCount(2, $table->getForeignKeys());
+    }
+}
diff --git a/tests/Functional/Schema/UniqueConstraintTest.php b/tests/Functional/Schema/UniqueConstraintTest.php
new file mode 100644
index 0000000000..3c06427eb6
--- /dev/null
+++ b/tests/Functional/Schema/UniqueConstraintTest.php
@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\DBAL\Tests\Functional\Schema;
+
+use Doctrine\DBAL\Schema\Column;
+use Doctrine\DBAL\Schema\Table;
+use Doctrine\DBAL\Schema\UniqueConstraint;
+use Doctrine\DBAL\Tests\FunctionalTestCase;
+use Doctrine\DBAL\Types\Type;
+use Doctrine\DBAL\Types\Types;
+
+final class UniqueConstraintTest extends FunctionalTestCase
+{
+    public function testUnnamedUniqueConstraint(): void
+    {
+        $this->dropTableIfExists('users');
+
+        $users = new Table('users', [
+            new Column('id', Type::getType(Types::INTEGER)),
+            new Column('username', Type::getType(Types::STRING), ['length' => 32]),
+            new Column('email', Type::getType(Types::STRING), ['length' => 255]),
+        ], [], [
+            new UniqueConstraint('', ['username']),
+            new UniqueConstraint('', ['email']),
+        ], []);
+
+        $sm = $this->connection->createSchemaManager();
+        $sm->createTable($users);
+
+        // we want to assert that the two empty names don't clash, but introspection of unique constraints is currently
+        // not supported. for now, we just assert that the table can be created without exceptions.
+        $this->expectNotToPerformAssertions();
+    }
+}
diff --git a/tests/Schema/IndexTest.php b/tests/Schema/IndexTest.php
index 0eb13502be..4538d55fdb 100644
--- a/tests/Schema/IndexTest.php
+++ b/tests/Schema/IndexTest.php
@@ -4,14 +4,17 @@
 
 namespace Doctrine\DBAL\Tests\Schema;
 
-use Doctrine\DBAL\Exception;
+use Doctrine\DBAL\Schema\Exception\InvalidName;
 use Doctrine\DBAL\Schema\Index;
 use Doctrine\DBAL\Schema\Name\Identifier;
+use Doctrine\Deprecations\PHPUnit\VerifyDeprecations;
 use PHPUnit\Framework\Attributes\DataProvider;
 use PHPUnit\Framework\TestCase;
 
 class IndexTest extends TestCase
 {
+    use VerifyDeprecations;
+
     /** @param mixed[] $options */
     private function createIndex(bool $unique = false, bool $primary = false, array $options = []): Index
     {
@@ -174,21 +177,24 @@ public function testOptions(): void
         self::assertSame(['where' => 'name IS NULL'], $idx2->getOptions());
     }
 
-    /** @throws Exception */
-    public function testGetNonNullObjectName(): void
+    public function testEmptyName(): void
     {
-        $index = new Index('idx_user_id', ['user_id']);
-        $name  = $index->getObjectName();
+        $this->expectException(InvalidName::class);
 
-        self::assertNotNull($name);
-        self::assertEquals(Identifier::unquoted('idx_user_id'), $name->getIdentifier());
+        new Index(null, ['user_id']);
     }
 
-    /** @throws Exception */
-    public function testGetNullObjectName(): void
+    public function testQualifiedName(): void
     {
-        $index = new Index(null, ['user_id']);
+        $this->expectException(InvalidName::class);
+
+        new Index('auth.idx_user_id', ['user_id']);
+    }
+
+    public function testGetObjectName(): void
+    {
+        $index = new Index('idx_user_id', ['user_id']);
 
-        self::assertNull($index->getObjectName());
+        self::assertEquals(Identifier::unquoted('idx_user_id'), $index->getObjectName()->getIdentifier());
     }
 }