diff --git a/webapp/src/Migrations/Version20210813195818.php b/webapp/src/Migrations/Version20210813195818.php
new file mode 100644
index 00000000000..a6db04d2581
--- /dev/null
+++ b/webapp/src/Migrations/Version20210813195818.php
@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Auto-generated Migration: Please modify to your needs!
+ */
+final class Version20210813195818 extends AbstractMigration
+{
+    public function getDescription() : string
+    {
+        return 'Remove JudgehostRestriction data';
+    }
+
+    public function up(Schema $schema) : void
+    {
+        // this up() migration is auto-generated, please modify it to your needs
+        $this->abortIf($this->connection->getDatabasePlatform()->getName() !== 'mysql', 'Migration can only be executed safely on \'mysql\'.');
+
+        $this->addSql('ALTER TABLE judgehost DROP FOREIGN KEY judgehost_ibfk_1');
+        $this->addSql('DROP TABLE judgehost_restriction');
+        $this->addSql('DROP INDEX restrictionid ON judgehost');
+        $this->addSql('ALTER TABLE judgehost DROP restrictionid, CHANGE polltime polltime NUMERIC(32, 9) UNSIGNED DEFAULT NULL COMMENT \'Time of last poll by autojudger\'');
+    }
+
+    public function down(Schema $schema) : void
+    {
+        // this down() migration is auto-generated, please modify it to your needs
+        $this->abortIf($this->connection->getDatabasePlatform()->getName() !== 'mysql', 'Migration can only be executed safely on \'mysql\'.');
+
+        $this->addSql('CREATE TABLE judgehost_restriction (restrictionid INT UNSIGNED AUTO_INCREMENT NOT NULL COMMENT \'Judgehost restriction ID\', name VARCHAR(255) CHARACTER SET utf8mb4 NOT NULL COLLATE `utf8mb4_unicode_ci` COMMENT \'Descriptive name\', restrictions LONGTEXT CHARACTER SET utf8mb4 DEFAULT \'NULL\' COLLATE `utf8mb4_unicode_ci` COMMENT \'JSON-encoded restrictions(DC2Type:json)\', PRIMARY KEY(restrictionid)) DEFAULT CHARACTER SET utf8 COLLATE `utf8_unicode_ci` ENGINE = InnoDB COMMENT = \'Restrictions for judgehosts\' ');
+        $this->addSql('ALTER TABLE judgehost ADD restrictionid INT UNSIGNED DEFAULT NULL COMMENT \'Judgehost restriction ID\', CHANGE polltime polltime NUMERIC(32, 9) UNSIGNED DEFAULT \'NULL\' COMMENT \'Time of last poll by autojudger\'');
+        $this->addSql('ALTER TABLE judgehost ADD CONSTRAINT judgehost_ibfk_1 FOREIGN KEY (restrictionid) REFERENCES judgehost_restriction (restrictionid) ON DELETE SET NULL');
+        $this->addSql('CREATE INDEX restrictionid ON judgehost (restrictionid)');
+    }
+}