How to revert views

I had a working view. I have tried to modify it by removing the the relationships then it crashes. Now I am not able to edit the view. How to revert back the previous changes of view. Here is the error appearing in edit page of view Notice: Undefined index: field_product_overview in Drupal\views\Plugin\views\HandlerBase->getEntityType() (line 700…

Magento 1.9.4 Third party model override doesn’t work

I’ve been trying for days now to get a rewritten model to function. but it doesn’t work, I’m puzzled because all seems to be correct. ___Here’s my config file : etek/advancednewslettercoupon/etc/config.xml <global> <models> <advancednewslettercoupon> <class>Etek_AdvancedNewsletterCoupon_Model</class> </advancednewslettercoupon> <advancednewsletter> <rewrite> <subscriber>Etek_AdvancedNewsletterCoupon_Model_Subscriber</subscriber> <rewrite> </advancednewsletter> </models> </global> __the subscriber model: Etek/AdvancedNewsletterCoupon/Model/Subscriber.php class Etek_AdvancedNewsletterCoupon_Model_Subscriber extends AW_Advancednewsletter_Model_Subscriber { _construct() { var_dump(‘Etek…