<?php
global $wpdb;

$iclsettings = get_option( 'icl_sitepress_settings' );
if ( is_array( $iclsettings['translation-management']['custom_fields_readonly_config'] ) ) {
	$iclsettings['translation-management']['custom_fields_readonly_config'] = array_unique( $iclsettings['translation-management']['custom_fields_readonly_config'] );
	update_option( 'icl_sitepress_settings', $iclsettings );
}
delete_option( $wpdb->prefix . 'icl_translators_cached' );
delete_option( $wpdb->prefix . 'icl_non_translators_cached' );