diff --git a/db-management/migrations/20260312103000-tdei-default-referral-code.js b/db-management/migrations/20260312103000-tdei-default-referral-code.js
new file mode 100644
index 0000000..bb60a47
--- /dev/null
+++ b/db-management/migrations/20260312103000-tdei-default-referral-code.js
@@ -0,0 +1,49 @@
+'use strict';
+
+var dbm;
+var type;
+var seed;
+var fs = require('fs');
+var path = require('path');
+var Promise;
+
+exports.setup = function(options, seedLink) {
+  dbm = options.dbmigrate;
+  type = dbm.dataType;
+  seed = seedLink;
+  Promise = options.Promise;
+};
+
+exports.up = function(db) {
+  var filePath = path.join(__dirname, 'sqls', '20260312103000-tdei-default-referral-code-up.sql');
+  return new Promise(function(resolve, reject) {
+    fs.readFile(filePath, { encoding: 'utf-8' }, function(err, data) {
+      if (err) return reject(err);
+      console.log('received data: ' + data);
+
+      resolve(data);
+    });
+  })
+    .then(function(data) {
+      return db.runSql(data);
+    });
+};
+
+exports.down = function(db) {
+  var filePath = path.join(__dirname, 'sqls', '20260312103000-tdei-default-referral-code-down.sql');
+  return new Promise(function(resolve, reject) {
+    fs.readFile(filePath, { encoding: 'utf-8' }, function(err, data) {
+      if (err) return reject(err);
+      console.log('received data: ' + data);
+
+      resolve(data);
+    });
+  })
+    .then(function(data) {
+      return db.runSql(data);
+    });
+};
+
+exports._meta = {
+  'version': 1
+};
diff --git a/db-management/migrations/sqls/20260312103000-tdei-default-referral-code-down.sql b/db-management/migrations/sqls/20260312103000-tdei-default-referral-code-down.sql
new file mode 100644
index 0000000..5e204b5
--- /dev/null
+++ b/db-management/migrations/sqls/20260312103000-tdei-default-referral-code-down.sql
@@ -0,0 +1,5 @@
+DELETE FROM public.promo_referrals pr
+USING public.project_group pg
+WHERE pr.project_group_id = pg.project_group_id
+  AND pg.name = 'TDEI Default'
+  AND UPPER(pr.code) = UPPER('TD-R89-PILT-CA');
diff --git a/db-management/migrations/sqls/20260312103000-tdei-default-referral-code-up.sql b/db-management/migrations/sqls/20260312103000-tdei-default-referral-code-up.sql
new file mode 100644
index 0000000..2fa90cb
--- /dev/null
+++ b/db-management/migrations/sqls/20260312103000-tdei-default-referral-code-up.sql
@@ -0,0 +1,35 @@
+WITH default_pg AS (
+    SELECT project_group_id
+    FROM public.project_group
+    WHERE name = 'TDEI Default'
+    LIMIT 1
+),
+system_usr AS (
+    SELECT id::uuid AS user_id
+    FROM keycloak.user_entity
+    WHERE email = 'admin@tdei.com'
+    LIMIT 1
+),
+fallback_user AS (
+    SELECT COALESCE((SELECT user_id FROM system_usr), gen_random_uuid()) AS user_id
+)
+INSERT INTO public.promo_referrals
+    (name, type, valid_from, code, valid_to, instructions_url, project_group_id, user_id, description, is_active, redirect_url)
+SELECT
+    'TDEI System Default Referral',
+    1,
+    NOW(),
+    'TD-R89-PILT-CA',
+    NULL,
+    NULL,
+    default_pg.project_group_id,
+    fallback_user.user_id,
+    'Default referral code for TDEI default project group',
+    true,
+    NULL
+FROM default_pg, fallback_user
+WHERE NOT EXISTS (
+    SELECT 1
+    FROM public.promo_referrals
+    WHERE UPPER(code) = UPPER('TD-R89-PILT-CA')
+);
diff --git a/src/service/user-management-service.ts b/src/service/user-management-service.ts
index 20b0960..c9f6e48 100644
--- a/src/service/user-management-service.ts
+++ b/src/service/user-management-service.ts
@@ -184,7 +184,8 @@ export class UserManagementService implements IUserManagement {
             let queryStr = format(`INSERT INTO user_roles (user_id, project_group_id, role_id)
                                         SELECT %L, project_group_id, role_id
                                         FROM roles, project_group
-                                        WHERE roles.name = %L AND project_group.name = %L`, userProfile.id, Role.TDEI_MEMBER, DEFAULT_PROJECT_GROUP);
+                                        WHERE roles.name = %L AND project_group.name = %L
+                                        ON CONFLICT ON CONSTRAINT unq_user_role_project_group DO NOTHING`, userProfile.id, Role.TDEI_MEMBER, DEFAULT_PROJECT_GROUP);
             await dbClient.query(queryStr);
             // }