diff --git a/dlt-database/entity/0001-init_db/User.ts b/dlt-database/entity/0001-init_db/User.ts
index a0cc2cb18..e396e14ca 100644
--- a/dlt-database/entity/0001-init_db/User.ts
+++ b/dlt-database/entity/0001-init_db/User.ts
@@ -11,7 +11,6 @@ export class User extends BaseEntity {
     name: 'gradido_id',
     length: 36,
     nullable: true,
-    unique: true,
     collation: 'utf8mb4_unicode_ci',
   })
   gradidoID?: string
diff --git a/dlt-database/migrations/0001-init_db.ts b/dlt-database/migrations/0001-init_db.ts
index 011c96783..d2ae6494b 100644
--- a/dlt-database/migrations/0001-init_db.ts
+++ b/dlt-database/migrations/0001-init_db.ts
@@ -22,7 +22,7 @@ export async function upgrade(queryFn: (query: string, values?: any[]) => Promis
       \`created_at\` datetime(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
       \`confirmed_at\` datetime(3) DEFAULT NULL,
       PRIMARY KEY (\`id\`),
-      UNIQUE KEY \`gradido_id\` (\`gradido_id\`),
+      INDEX \`gradido_id\` (\`gradido_id\`),
       UNIQUE KEY \`pubkey\` (\`pubkey\`)
     ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;`)