Add Feed Name exists failure possible reason;

Remove unused method from token invalid notice class;

src/Feeds.php

@@ -15,7 +15,9 @@
 use Automattic\WooCommerce\Pinterest\API\APIV5;
 use Automattic\WooCommerce\Pinterest\LocalFeedConfigs;
 use Automattic\WooCommerce\Pinterest\Exception\PinterestApiLocaleException;
+use Automattic\WooCommerce\Pinterest\Notes\FeedNameExistsFailure;
 use Exception;
+use Pinterest_For_Woocommerce;
 use Throwable;
 
 /**
@@ -152,6 +154,10 @@ public static function create_feed(): string {
 		try {
 			$feed = APIV5::create_feed( $data, $ad_account_id );
 		} catch ( PinterestApiException $e ) {
+			if ( 422 === $e->getCode() ) {
+				FeedNameExistsFailure::possibly_add_note();
+			}
+
 			$delay = Pinterest_For_Woocommerce()::get_data( 'create_feed_delay' ) ?? MINUTE_IN_SECONDS;
 			set_transient( $cache_key, $e->getCode(), $delay );
 			// Double the delay.

src/Notes/FeedNameExistsFailure.php

@@ -0,0 +1,83 @@
+<?php
+/**
+ * WooCommerce Admin: Feed with the same name already exists at Pinterest notice.
+ *
+ * Adds a note to inform clients there is a feed from another website already at Pinterest.
+ *
+ * @package Automattic\WooCommerce\Pinterest\Notes
+ */
+
+namespace Automattic\WooCommerce\Pinterest\Notes;
+
+defined( 'ABSPATH' ) || exit;
+
+use Automattic\WooCommerce\Admin\Notes\Note;
+use Automattic\WooCommerce\Admin\Notes\Notes;
+use Automattic\WooCommerce\Admin\Notes\NotesUnavailableException;
+use Automattic\WooCommerce\Admin\Notes\NoteTraits;
+
+/**
+ * Feed name already exists at Pinterest admin notice.
+ */
+class FeedNameExistsFailure {
+	/**
+	 * Note traits.
+	 */
+	use NoteTraits;
+
+	/**
+	 * Name of the note for use in the database.
+	 */
+	const NOTE_NAME = 'pinterest-for-woocommerce-feed-name-exists-failure';
+
+	/**
+	 * Get the note.
+	 *
+	 * @since x.x.x
+	 *
+	 * @return Note
+	 */
+	public static function get_note() {
+		$content_lines = array(
+			__( 'The Pinterest For WooCommerce plugin has detected an issue with your feed.<br/>The feed with the same name already exists at Pinterest.<br/>This can be due to another website already connected to the same Pinterest account.', 'pinterest-for-woocommerce' ),
+		);
+
+		$additional_data = array(
+			'role' => 'administrator',
+		);
+
+		$note = new Note();
+		$note->set_title( __( 'Pinterest For WooCommerce action required.', 'pinterest-for-woocommerce' ) );
+		$note->set_content( implode( '', $content_lines ) );
+		$note->set_content_data( (object) $additional_data );
+		$note->set_type( Note::E_WC_ADMIN_NOTE_ERROR );
+		$note->set_name( self::NOTE_NAME );
+		$note->set_source( 'woocommerce-admin' );
+		$note->add_action(
+			'pinterest-for-woocommerce-feed-name-exists-failure-disconnect',
+			__( 'Disconnect Pinterest', 'pinterest-for-woocommerce' ),
+			admin_url( 'admin.php?page=wc-admin&path=/pinterest/onboarding' ),
+			Note::E_WC_ADMIN_NOTE_ACTIONED,
+			true,
+			'primary'
+		);
+		return $note;
+	}
+
+	/**
+	 * Add the note if it passes predefined conditions.
+	 *
+	 * @since x.x.x
+	 *
+	 * @return void
+	 * @throws NotesUnavailableException Throws exception when notes are unavailable.
+	 */
+	public static function possibly_add_note() {
+		if ( self::note_exists() ) {
+			return;
+		}
+
+		$note = self::get_note();
+		$note->save();
+	}
+}

src/Notes/TokenInvalidFailure.php

@@ -76,13 +76,4 @@ public static function possibly_add_note() {
 		$note = self::get_note();
 		$note->save();
 	}
-
-	/**
-	 * Delete the note.
-	 *
-	 * @return void
-	 */
-	public static function delete_failure_note() {
-		Notes::delete_notes_with_name( self::NOTE_NAME );
-	}
 }