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Hi I have updated my wordpress site manually, now i get below mentioned error in the front and backend.

Notice: register_sidebar was called incorrectly. No id was set in the arguments array for the "Main Sidebar" sidebar. Defaulting to "sidebar-1". Manually set the id to "sidebar-1" to silence this notice and keep existing sidebar content. Please see Debugging in WordPress for more information. (This message was added in version 4.2.0.)

Can anyone help?

closed as unclear what you're asking by TheDeadMedic, Mark Kaplun, birgire, Howdy_McGee, fuxia Jun 4 '16 at 6:28

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    The error says itself that what is wrong! – Sumit May 20 '16 at 11:09
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    @Sumit I seriously don't understand how some people can't work out these errors - you don't need to be a programmer you just need to know how to read! – TheDeadMedic May 20 '16 at 11:34
  • Because they know somebody here will fix it before they finish reading error message :D – Sumit May 20 '16 at 11:47
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  1. Find file where is register_sidebar ( must be on theme folder or plugins )

  2. add ID to sidebar

    register_sidebar( array(
       'name' => __( 'Main Sidebar', 'theme-slug' ),
    
       'id' => 'change_me',  // Add only this line
    
       'description' => __( 'Widgets in this area will be shown on all posts and pages.', 'theme-slug' ),
       'before_widget' => '<li id="%1$s" class="widget %2$s">',
       'after_widget'  => '</li>',
       'before_title'  => '<h2 class="widgettitle">',
       'after_title'   => '</h2>',
     ) );
    

Or you can just disable notification in wp-config.php

edit WP_DEBUG to false

define('WP_DEBUG', false);
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Looks like you have a very old theme. You'll have to search the functions.php file for register_sidebar and make sure the $args follow the format mentioned in the codex.

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