diff --git a/client/src/app/install/install-step-4-user-system.js b/client/src/app/install/install-step-4-user-system.js
index 528efd8a..d4ae18c0 100644
--- a/client/src/app/install/install-step-4-user-system.js
+++ b/client/src/app/install/install-step-4-user-system.js
@@ -30,7 +30,6 @@ class InstallStep4UserSystem extends React.Component {
                     <FormField name="registration" label={i18n('ENABLE_USER_REGISTRATION')} decorator={ToggleButton} fieldProps={{disabled: this.isDisabled()}}/>
                     <div className="install-step-4__buttons">
                         <SubmitButton className="install-step-4__next" size="medium" type="secondary">{i18n('NEXT')}</SubmitButton>
-                        <Button className="install-step-4__previous" size="medium" onClick={this.onPreviousClick.bind(this)}>{i18n('PREVIOUS')}</Button>
                     </div>
                 </Form>
             </div>
@@ -46,17 +45,12 @@ class InstallStep4UserSystem extends React.Component {
         });
     }
 
-    onPreviousClick(event) {
-        event.preventDefault();
-        history.push('/install/step-3');
-    }
-
     onSubmit(form) {
         this.props.dispatch(ConfigActions.updateUserSystemSettings({
             'user-system-enabled': form['user-system-enabled'] * 1,
             'registration': form['registration'] * 1
         }));
-        
+
         history.push('/install/step-5');
     }
 
@@ -69,4 +63,4 @@ export default connect((store) => {
     return {
         language: store.config.language
     };
-})(InstallStep4UserSystem);
\ No newline at end of file
+})(InstallStep4UserSystem);
diff --git a/server/controllers/system/check-requirements.php b/server/controllers/system/check-requirements.php
index 5eb35cb2..1958460f 100755
--- a/server/controllers/system/check-requirements.php
+++ b/server/controllers/system/check-requirements.php
@@ -30,7 +30,9 @@ class CheckRequirementsController extends Controller {
     }
 
     public function handler() {
-        $configWritable = !!fopen('config.php', 'w+');
+        if(InstallationDoneController::isInstallationDone()) {
+          throw new Exception(ERRORS::INIT_SETTINGS_DONE);
+        }
 
         Response::respondSuccess([
             'phpVersion' => [
@@ -50,8 +52,8 @@ class CheckRequirementsController extends Controller {
             ],
             'files' => [
                 'name' => 'Folder: /api/files',
-                'value' => $configWritable ? 'Writable' : 'Not writable',
-                'ok' => $configWritable
+                'value' => is_writable('files') ? 'Writable' : 'Not writable',
+                'ok' => is_writable('files')
             ]
         ]);
     }
@@ -64,4 +66,4 @@ class CheckRequirementsController extends Controller {
         else if($currentVersion[0] < $requiredVersion[0]) return false;
         else return $currentVersion[1] >= $requiredVersion[1];
     }
-}
\ No newline at end of file
+}
diff --git a/server/controllers/system/init-database.php b/server/controllers/system/init-database.php
index dd21c026..d777add9 100755
--- a/server/controllers/system/init-database.php
+++ b/server/controllers/system/init-database.php
@@ -48,9 +48,7 @@ class InitDatabaseController extends Controller {
         $dbUser = Controller::request('dbUser');
         $dbPass = Controller::request('dbPassword');
 
-        if(!defined('MYSQL_HOST')) {
-            RedBean::setup('mysql:host=' . $dbHost, $dbUser, $dbPass);
-        }
+        RedBean::setup('mysql:host=' . $dbHost, $dbUser, $dbPass);
 
         if($dbName) {
             RedBean::addDatabase($dbName, 'mysql:host='. $dbHost . ';dbname=' . $dbName, $dbUser, $dbPass);
@@ -81,4 +79,4 @@ class InitDatabaseController extends Controller {
         fclose($configFile);
         Response::respondSuccess();
     }
-}
\ No newline at end of file
+}
diff --git a/tests/system/init-settings.rb b/tests/system/init-settings.rb
index 920815dc..4a10c846 100644
--- a/tests/system/init-settings.rb
+++ b/tests/system/init-settings.rb
@@ -1,4 +1,17 @@
 describe '/system/init-settings' do
+    it 'should prevent initing database if already called' do
+      result = request('/system/init-database', {})
+      (result['status']).should.equal('fail')
+      (result['message']).should.equal('INIT_SETTINGS_DONE')
+
+      result = request('/system/check-requirements', {})
+      (result['status']).should.equal('success')
+
+      result = request('/system/init-database', {})
+      (result['status']).should.equal('fail')
+      (result['message']).should.equal('INIT_SETTINGS_DONE')
+    end
+
     it 'should initialize correctly' do
         result = request('/system/init-settings', {
             'user-system-enabled' => true,
@@ -25,4 +38,4 @@ describe '/system/init-settings' do
 
         (result['status']).should.equal('success')
     end
-end
\ No newline at end of file
+end