diff --git src/wp-includes/user.php src/wp-includes/user.php
index 41eccf7..6d473ef 100644
--- src/wp-includes/user.php
+++ src/wp-includes/user.php
@@ -1346,7 +1346,6 @@ function validate_username( $username ) {
  * @since 2.0.0
  * @since 3.6.0 The `aim`, `jabber`, and `yim` fields were removed as default user contact
  *              methods for new installs. See wp_get_user_contact_methods().
- * @since 4.7.0 The `import_id` field was added to suggest the User ID.
  *
  * @global wpdb $wpdb WordPress database abstraction object.
  *
@@ -1381,7 +1380,6 @@ function validate_username( $username ) {
  *     @type string|bool $show_admin_bar_front Whether to display the Admin Bar for the user on the
  *                                             site's front end. Default true.
  *     @type string      $role                 User's role.
- *     @type int         $import_id            Suggested Uer ID, use it if not already present.
  * }
  * @return int|WP_Error The newly created user's ID or a WP_Error object if the user could not
  *                      be created.
@@ -1598,8 +1596,6 @@ function wp_insert_user( $userdata ) {
 
 	$user_nicename_check = $wpdb->get_var( $wpdb->prepare("SELECT ID FROM $wpdb->users WHERE user_nicename = %s AND user_login != %s LIMIT 1" , $user_nicename, $user_login));
 
-	$import_id = empty( $userdata['import_id'] ) ? 0 : $userdata['import_id'];
-
 	if ( $user_nicename_check ) {
 		$suffix = 2;
 		while ($user_nicename_check) {
@@ -1622,13 +1618,6 @@ function wp_insert_user( $userdata ) {
 		$wpdb->update( $wpdb->users, $data, compact( 'ID' ) );
 		$user_id = (int) $ID;
 	} else {
-		// If there is a suggested ID, use it if not already present.
-		if ( ! empty( $import_id ) ) {
-			$import_id = (int) $import_id;
-			if ( ! $wpdb->get_var( $wpdb->prepare("SELECT ID FROM $wpdb->users WHERE ID = %d", $import_id) ) ) {
-				$data['ID'] = $import_id;
-			}
-		}
 		$wpdb->insert( $wpdb->users, $data + compact( 'user_login' ) );
 		$user_id = (int) $wpdb->insert_id;
 	}