diff --git a/src/application/config/migration.php b/src/application/config/migration.php
index 1546ae4d..98964bd8 100644
--- a/src/application/config/migration.php
+++ b/src/application/config/migration.php
@@ -37,7 +37,7 @@ $config['migration_table'] = 'ea_migrations';
 | be upgraded / downgraded to.
 |
 */
-$config['migration_version'] = 10; // current
+$config['migration_version'] = 11; // current
 
 
 /*
diff --git a/src/application/migrations/011_remove_prefix_from_fkey_constraints.php b/src/application/migrations/011_remove_prefix_from_fkey_constraints.php
new file mode 100644
index 00000000..0adc878e
--- /dev/null
+++ b/src/application/migrations/011_remove_prefix_from_fkey_constraints.php
@@ -0,0 +1,130 @@
+<?php defined('BASEPATH') OR exit('No direct script access allowed');
+
+/* ----------------------------------------------------------------------------
+ * Easy!Appointments - Open Source Web Scheduler
+ *
+ * @package     EasyAppointments
+ * @author      A.Tselegidis <alextselegidis@gmail.com>
+ * @copyright   Copyright (c) 2013 - 2018, Alex Tselegidis
+ * @license     http://opensource.org/licenses/GPL-3.0 - GPLv3
+ * @link        http://easyappointments.org
+ * @since       v1.3.0
+ * ---------------------------------------------------------------------------- */
+
+class Migration_Remove_prefix_from_fkey_constraints extends CI_Migration {
+    public function up()
+    {
+        // Drop table constraints.
+        $this->db->query('ALTER TABLE ea_appointments DROP FOREIGN KEY ea_appointments_ea_services');
+        $this->db->query('ALTER TABLE ea_appointments DROP FOREIGN KEY ea_appointments_ea_users_customer');
+        $this->db->query('ALTER TABLE ea_appointments DROP FOREIGN KEY ea_appointments_ea_users_provider');
+        $this->db->query('ALTER TABLE ea_secretaries_providers DROP FOREIGN KEY ea_secretaries_ea_users_secretary');
+        $this->db->query('ALTER TABLE ea_secretaries_providers DROP FOREIGN KEY ea_secretaries_ea_users_provider');
+        $this->db->query('ALTER TABLE ea_services_providers DROP FOREIGN KEY ea_services_providers_ea_users_provider');
+        $this->db->query('ALTER TABLE ea_services_providers DROP FOREIGN KEY ea_services_providers_ea_services');
+        $this->db->query('ALTER TABLE ea_services DROP FOREIGN KEY ea_services_ea_service_categories');
+        $this->db->query('ALTER TABLE ea_users DROP FOREIGN KEY ea_users_ea_roles');
+        $this->db->query('ALTER TABLE ea_user_settings DROP FOREIGN KEY ea_user_settings_ea_users');
+
+        // Add table constraints again without the "ea" prefix.
+        $this->db->query('ALTER TABLE `ea_appointments`
+            ADD CONSTRAINT `appointments_users_customer` FOREIGN KEY (`id_users_customer`) REFERENCES `ea_users` (`id`)
+            ON DELETE CASCADE
+            ON UPDATE CASCADE,
+            ADD CONSTRAINT `appointments_services` FOREIGN KEY (`id_services`) REFERENCES `ea_services` (`id`)
+            ON DELETE CASCADE
+            ON UPDATE CASCADE,
+            ADD CONSTRAINT `appointments_users_provider` FOREIGN KEY (`id_users_provider`) REFERENCES `ea_users` (`id`)
+            ON DELETE CASCADE
+            ON UPDATE CASCADE');
+
+        $this->db->query('ALTER TABLE `ea_secretaries_providers`
+            ADD CONSTRAINT `secretaries_users_secretary` FOREIGN KEY (`id_users_secretary`) REFERENCES `ea_users` (`id`)
+            ON DELETE CASCADE
+            ON UPDATE CASCADE,
+            ADD CONSTRAINT `secretaries_users_provider` FOREIGN KEY (`id_users_provider`) REFERENCES `ea_users` (`id`)
+            ON DELETE CASCADE
+            ON UPDATE CASCADE');
+
+        $this->db->query('ALTER TABLE `ea_services`
+            ADD CONSTRAINT `services_service_categories` FOREIGN KEY (`id_service_categories`) REFERENCES `ea_service_categories` (`id`)
+            ON DELETE SET NULL
+            ON UPDATE CASCADE');
+
+        $this->db->query('ALTER TABLE `ea_services_providers`
+            ADD CONSTRAINT `services_providers_users_provider` FOREIGN KEY (`id_users`) REFERENCES `ea_users` (`id`)
+            ON DELETE CASCADE
+            ON UPDATE CASCADE,
+            ADD CONSTRAINT `services_providers_services` FOREIGN KEY (`id_services`) REFERENCES `ea_services` (`id`)
+            ON DELETE CASCADE
+            ON UPDATE CASCADE');
+
+        $this->db->query('ALTER TABLE `ea_users`
+            ADD CONSTRAINT `users_roles` FOREIGN KEY (`id_roles`) REFERENCES `ea_roles` (`id`)
+            ON DELETE CASCADE
+            ON UPDATE CASCADE');
+
+        $this->db->query('ALTER TABLE `ea_user_settings`
+            ADD CONSTRAINT `user_settings_users` FOREIGN KEY (`id_users`) REFERENCES `ea_users` (`id`)
+            ON DELETE CASCADE
+            ON UPDATE CASCADE');
+    }
+
+    public function down()
+    {
+        // Drop table constraints.
+        $this->db->query('ALTER TABLE ea_appointments DROP FOREIGN KEY appointments_services');
+        $this->db->query('ALTER TABLE ea_appointments DROP FOREIGN KEY appointments_users_customer');
+        $this->db->query('ALTER TABLE ea_appointments DROP FOREIGN KEY appointments_users_provider');
+        $this->db->query('ALTER TABLE ea_secretaries_providers DROP FOREIGN KEY secretaries_users_secretary');
+        $this->db->query('ALTER TABLE ea_secretaries_providers DROP FOREIGN KEY secretaries_users_provider');
+        $this->db->query('ALTER TABLE ea_services_providers DROP FOREIGN KEY services_providers_users_provider');
+        $this->db->query('ALTER TABLE ea_services_providers DROP FOREIGN KEY services_providers_services');
+        $this->db->query('ALTER TABLE ea_services DROP FOREIGN KEY services_service_categories');
+        $this->db->query('ALTER TABLE ea_users DROP FOREIGN KEY users_roles');
+        $this->db->query('ALTER TABLE ea_user_settings DROP FOREIGN KEY user_settings_users');
+
+        // Add table constraints again.
+        $this->db->query('ALTER TABLE `ea_appointments`
+            ADD CONSTRAINT `ea_appointments_ea_users_customer` FOREIGN KEY (`id_users_customer`) REFERENCES `ea_users` (`id`)
+            ON DELETE CASCADE
+            ON UPDATE CASCADE,
+            ADD CONSTRAINT `ea_appointments_ea_services` FOREIGN KEY (`id_services`) REFERENCES `ea_services` (`id`)
+            ON DELETE CASCADE
+            ON UPDATE CASCADE,
+            ADD CONSTRAINT `ea_appointments_ea_users_provider` FOREIGN KEY (`id_users_provider`) REFERENCES `ea_users` (`id`)
+            ON DELETE CASCADE
+            ON UPDATE CASCADE');
+
+        $this->db->query('ALTER TABLE `ea_secretaries_providers`
+            ADD CONSTRAINT `ea_secretaries_ea_users_secretary` FOREIGN KEY (`id_users_secretary`) REFERENCES `ea_users` (`id`)
+            ON DELETE CASCADE
+            ON UPDATE CASCADE,
+            ADD CONSTRAINT `ea_secretaries_ea_users_provider` FOREIGN KEY (`id_users_provider`) REFERENCES `ea_users` (`id`)
+            ON DELETE CASCADE
+            ON UPDATE CASCADE');
+
+        $this->db->query('ALTER TABLE `ea_services`
+            ADD CONSTRAINT `ea_services_ea_service_categories` FOREIGN KEY (`id_service_categories`) REFERENCES `ea_service_categories` (`id`)
+            ON DELETE SET NULL
+            ON UPDATE CASCADE');
+
+        $this->db->query('ALTER TABLE `ea_services_providers`
+            ADD CONSTRAINT `ea_services_providers_ea_users_provider` FOREIGN KEY (`id_users`) REFERENCES `ea_users` (`id`)
+            ON DELETE CASCADE
+            ON UPDATE CASCADE,
+            ADD CONSTRAINT `ea_services_providers_ea_services` FOREIGN KEY (`id_services`) REFERENCES `ea_services` (`id`)
+            ON DELETE CASCADE
+            ON UPDATE CASCADE');
+
+        $this->db->query('ALTER TABLE `ea_users`
+            ADD CONSTRAINT `ea_users_ea_roles` FOREIGN KEY (`id_roles`) REFERENCES `ea_roles` (`id`)
+            ON DELETE CASCADE
+            ON UPDATE CASCADE');
+
+        $this->db->query('ALTER TABLE `ea_user_settings`
+            ADD CONSTRAINT `ea_user_settings_ea_users` FOREIGN KEY (`id_users`) REFERENCES `ea_users` (`id`)
+            ON DELETE CASCADE
+            ON UPDATE CASCADE');
+    }
+}
diff --git a/src/assets/sql/structure.sql b/src/assets/sql/structure.sql
index 77438004..dbaab393 100644
--- a/src/assets/sql/structure.sql
+++ b/src/assets/sql/structure.sql
@@ -49,8 +49,8 @@ CREATE TABLE IF NOT EXISTS `ea_secretaries_providers` (
     `id_users_secretary` BIGINT(20) UNSIGNED NOT NULL,
     `id_users_provider` BIGINT(20) UNSIGNED NOT NULL,
     PRIMARY KEY (`id_users_secretary`, `id_users_provider`),
-    KEY `fk_ea_secretaries_providers_1` (`id_users_secretary`),
-    KEY `fk_ea_secretaries_providers_2` (`id_users_provider`)
+    KEY `id_users_secretary` (`id_users_secretary`),
+    KEY `id_users_provider` (`id_users_provider`)
 )
     ENGINE = InnoDB
     DEFAULT CHARSET = utf8;
@@ -143,49 +143,43 @@ CREATE TABLE IF NOT EXISTS `ea_user_settings` (
 
 
 ALTER TABLE `ea_appointments`
-    ADD CONSTRAINT `ea_appointments_ibfk_2` FOREIGN KEY (`id_users_customer`) REFERENCES `ea_users` (`id`)
+    ADD CONSTRAINT `appointments_users_customer` FOREIGN KEY (`id_users_customer`) REFERENCES `ea_users` (`id`)
     ON DELETE CASCADE
     ON UPDATE CASCADE,
-    ADD CONSTRAINT `ea_appointments_ibfk_3` FOREIGN KEY (`id_services`) REFERENCES `ea_services` (`id`)
+    ADD CONSTRAINT `appointments_services` FOREIGN KEY (`id_services`) REFERENCES `ea_services` (`id`)
     ON DELETE CASCADE
     ON UPDATE CASCADE,
-    ADD CONSTRAINT `ea_appointments_ibfk_4` FOREIGN KEY (`id_users_provider`) REFERENCES `ea_users` (`id`)
+    ADD CONSTRAINT `appointments_users_provider` FOREIGN KEY (`id_users_provider`) REFERENCES `ea_users` (`id`)
     ON DELETE CASCADE
     ON UPDATE CASCADE;
 
-
 ALTER TABLE `ea_secretaries_providers`
-    ADD CONSTRAINT `fk_ea_secretaries_providers_1` FOREIGN KEY (`id_users_secretary`) REFERENCES `ea_users` (`id`)
+    ADD CONSTRAINT `secretaries_users_secretary` FOREIGN KEY (`id_users_secretary`) REFERENCES `ea_users` (`id`)
     ON DELETE CASCADE
     ON UPDATE CASCADE,
-    ADD CONSTRAINT `fk_ea_secretaries_providers_2` FOREIGN KEY (`id_users_provider`) REFERENCES `ea_users` (`id`)
+    ADD CONSTRAINT `secretaries_users_provider` FOREIGN KEY (`id_users_provider`) REFERENCES `ea_users` (`id`)
     ON DELETE CASCADE
     ON UPDATE CASCADE;
 
-
 ALTER TABLE `ea_services`
-    ADD CONSTRAINT `ea_services_ibfk_1` FOREIGN KEY (`id_service_categories`) REFERENCES `ea_service_categories` (`id`)
+    ADD CONSTRAINT `services_service_categories` FOREIGN KEY (`id_service_categories`) REFERENCES `ea_service_categories` (`id`)
     ON DELETE SET NULL
     ON UPDATE CASCADE;
 
-
 ALTER TABLE `ea_services_providers`
-    ADD CONSTRAINT `ea_services_providers_ibfk_1` FOREIGN KEY (`id_users`) REFERENCES `ea_users` (`id`)
+    ADD CONSTRAINT `services_providers_users_provider` FOREIGN KEY (`id_users`) REFERENCES `ea_users` (`id`)
     ON DELETE CASCADE
     ON UPDATE CASCADE,
-    ADD CONSTRAINT `ea_services_providers_ibfk_2` FOREIGN KEY (`id_services`) REFERENCES `ea_services` (`id`)
+    ADD CONSTRAINT `services_providers_services` FOREIGN KEY (`id_services`) REFERENCES `ea_services` (`id`)
     ON DELETE CASCADE
     ON UPDATE CASCADE;
 
-
 ALTER TABLE `ea_users`
-    ADD CONSTRAINT `ea_users_ibfk_1` FOREIGN KEY (`id_roles`) REFERENCES `ea_roles` (`id`)
+    ADD CONSTRAINT `users_roles` FOREIGN KEY (`id_roles`) REFERENCES `ea_roles` (`id`)
     ON DELETE CASCADE
     ON UPDATE CASCADE;
 
-
 ALTER TABLE `ea_user_settings`
-    ADD CONSTRAINT `ea_user_settings_ibfk_1` FOREIGN KEY (`id_users`) REFERENCES `ea_users` (`id`)
+    ADD CONSTRAINT `user_settings_users` FOREIGN KEY (`id_users`) REFERENCES `ea_users` (`id`)
     ON DELETE CASCADE
     ON UPDATE CASCADE;
-