diff --git a/core/server/data/migrations/versions/4.0/23-add-primary-key-brute-migrations-lock.js b/core/server/data/migrations/versions/4.0/23-add-primary-key-brute-migrations-lock.js
new file mode 100644
index 0000000000..72b3b9a16d
--- /dev/null
+++ b/core/server/data/migrations/versions/4.0/23-add-primary-key-brute-migrations-lock.js
@@ -0,0 +1,9 @@
+const logging = require('../../../../../shared/logging');
+const {createIrreversibleMigration} = require('../../utils');
+const {addPrimaryKey} = require('../../../schema/commands');
+
+module.exports = createIrreversibleMigration(async (knex) => {
+    logging.info('Adding a primary key for the brute table');
+
+    await addPrimaryKey('brute', 'key', knex);
+});
diff --git a/core/server/data/schema/schema.js b/core/server/data/schema/schema.js
index b3f0a72f35..45daae7915 100644
--- a/core/server/data/schema/schema.js
+++ b/core/server/data/schema/schema.js
@@ -252,7 +252,7 @@ module.exports = {
         updated_by: {type: 'string', maxlength: 24, nullable: true}
     },
     brute: {
-        key: {type: 'string', maxlength: 191},
+        key: {type: 'string', maxlength: 191, primary: true},
         firstRequest: {type: 'bigInteger'},
         lastRequest: {type: 'bigInteger'},
         lifetime: {type: 'bigInteger'},
diff --git a/test/unit/data/schema/integrity_spec.js b/test/unit/data/schema/integrity_spec.js
index 2bcce8436e..a9d3c82796 100644
--- a/test/unit/data/schema/integrity_spec.js
+++ b/test/unit/data/schema/integrity_spec.js
@@ -32,7 +32,7 @@ const defaultSettings = require('../../../../core/server/data/schema/default-set
  */
 describe('DB version integrity', function () {
     // Only these variables should need updating
-    const currentSchemaHash = '5861ed57418a0195ea01e431b8b55335';
+    const currentSchemaHash = 'd44979f33e39fafd9e1e25dd48e0d5d2';
     const currentFixturesHash = '370d0da0ab7c45050b2ff30bce8896ba';
     const currentSettingsHash = 'e1f85186a7c7ed76064b6026f68c6321';
     const currentRoutesHash = '3d180d52c663d173a6be791ef411ed01';