Drupal 8: Remove duplicate records in view

remove_view_duplicates.includes.php

<?php

/**
 * Implements hook_preprocess_views_view
 */
function my_module_preprocess_views_view(&$vars){
// Only use unique IDs for view.
  // Use this code for views with Better Exposed Filters.
	if ($vars['view']->id() === 'view_name_bef') {
		$rows = [];
		if (isset($vars['rows']['output'][0])) {
			$rows = $vars['rows']['output'][0]['#rows'];
		}
		$new_rows = [];
		$used_nids = [];
		if (is_array($rows)) {
			foreach ($rows as $row){
				$nid = $row['#row']->node_field_data_nid; // Change to the field you want to be unique.
				if (!in_array($nid, $used_nids)) {
					$used_nids[] = $nid;
					$new_rows[] = $row;
				}
			}
			$vars['rows']['output'][0]['#rows'] = $new_rows;
		}
	}
	// Use this code for views without Better Exposed Filters.
	if ($vars['view']->id() === 'view_name_no_bef') {
		$rows = $vars['rows'][0]['#rows'];
		$new_rows = [];
		$used_nids = [];
		foreach ($rows as $row){
			$nid = $row['#row']->node_field_data_nid; // Change to the field you want to be unique.
			if (!in_array($nid, $used_nids)) {
				$used_service_tids[] = $nid;
				$new_rows[] = $row;
			}
		}
		$vars['rows'][0]['#rows'] = $new_rows;
	}
}