diff --git a/.version b/.version
index a0cd9f0cc..50e47c89c 100644
--- a/.version
+++ b/.version
@@ -1 +1 @@
-3.1.0
\ No newline at end of file
+3.1.1
\ No newline at end of file
diff --git a/php/class-delivery.php b/php/class-delivery.php
index 460a09b1d..ab7850c95 100644
--- a/php/class-delivery.php
+++ b/php/class-delivery.php
@@ -329,8 +329,12 @@ public function generate_signature( $attachment_id ) {
 		if ( ! $sql ) {
 			$sql = Utils::get_table_sql();
 		}
+		$public_id          = null;
+		$relationship       = Relationship::get_relationship( $attachment_id );
+		if ( $relationship instanceof Relationship ) {
+			$public_id = $relationship->public_id;
+		}
 		$sizes              = $this->get_sized( $attachment_id );
-		$public_id          = $this->media->has_public_id( $attachment_id ) ? $this->media->get_public_id( $attachment_id ) : null;
 		$settings_signature = self::get_settings_signature();
 		$relation_signature = $this->media->get_post_meta( $attachment_id, Sync::META_KEYS['relationship'], true );
 
@@ -480,8 +484,6 @@ public function unsync_size_relationship( $attachment_id ) {
 		self::update_size_relations_public_id( $attachment_id, null );
 		self::update_size_relations_state( $attachment_id, 'disable' );
 		self::update_size_relations_transformations( $attachment_id, null );
-
-		do_action( 'cloudinary_flush_cache' );
 	}
 
 	/**
@@ -521,12 +523,13 @@ public function get_sized( $attachment_id ) {
 	 */
 	public static function update_size_relations_public_id( $attachment_id, $public_id ) {
 		$relationship              = Relationship::get_relationship( $attachment_id );
-		$relationship->public_id   = $public_id;
-		$relationship->public_hash = md5( $public_id );
-		$relationship->signature   = self::get_settings_signature();
-		$relationship->save();
 
-		do_action( 'cloudinary_flush_cache' );
+		if ( $relationship instanceof Relationship ) {
+			$relationship->public_id   = $public_id;
+			$relationship->public_hash = md5( $public_id );
+			$relationship->signature   = self::get_settings_signature();
+			$relationship->save();
+		}
 	}
 
 	/**
@@ -537,8 +540,11 @@ public static function update_size_relations_public_id( $attachment_id, $public_
 	 */
 	public static function update_size_relations_state( $attachment_id, $state ) {
 		$relationship             = Relationship::get_relationship( $attachment_id );
-		$relationship->post_state = $state;
-		$relationship->save();
+
+		if ( $relationship instanceof Relationship ) {
+			$relationship->post_state = $state;
+			$relationship->save();
+		}
 
 		do_action( 'cloudinary_flush_cache' );
 	}
@@ -551,7 +557,6 @@ public static function update_size_relations_state( $attachment_id, $state ) {
 	 */
 	public static function update_size_relations_transformations( $attachment_id, $transformations ) {
 		Relate::update_transformations( $attachment_id, $transformations );
-		do_action( 'cloudinary_flush_cache' );
 	}
 
 	/**
@@ -700,11 +705,16 @@ public function clear_cache() {
 	/**
 	 * Delete cached metadata.
 	 *
+	 * @param bool $hard Whether to hard flush the cache.
+	 *
 	 * @hook cloudinary_flush_cache
 	 */
-	public function do_clear_cache() {
+	public function do_clear_cache( $hard = true ) {
 		delete_post_meta_by_key( self::META_CACHE_KEY );
-		wp_cache_flush();
+
+		if ( $hard ) {
+			wp_cache_flush();
+		}
 	}
 
 	/**
diff --git a/php/relate/class-relationship.php b/php/relate/class-relationship.php
index fbeb072a7..51ba52963 100644
--- a/php/relate/class-relationship.php
+++ b/php/relate/class-relationship.php
@@ -13,6 +13,12 @@
 
 /**
  * Class Relationship
+ *
+ * @property string|null $post_state
+ * @property string|null $public_hash
+ * @property string|null $public_id
+ * @property string|null $signature
+ * @property string|null $transformations
  */
 class Relationship {
 
@@ -105,6 +111,7 @@ public function save() {
 		if ( ! $this->save_on_shutdown ) {
 			$this->save_on_shutdown = true;
 			add_action( 'shutdown', array( $this, 'do_save' ) );
+			add_action( 'shutdown', array( $this, 'flush_cache' ), 100 );
 		}
 	}
 
@@ -115,9 +122,23 @@ public function save() {
 	 */
 	public function do_save() {
 		global $wpdb;
-		$data = $this->get_data();
+		$data   = $this->get_data();
+		$update = false;
+
+		if ( ! empty( $data['id'] ) ) {
+			$update = $wpdb->update( Utils::get_relationship_table(), $data, array( 'id' => $data['id'] ), array( '%s' ), array( '%d' ) );// phpcs:ignore WordPress.DB
+		}
+
+		return $update;
+	}
 
-		return $wpdb->update( Utils::get_relationship_table(), $data, array( 'id' => $data['id'] ), array( '%s' ), array( '%d' ) );// phpcs:ignore WordPress.DB
+	/**
+	 * Flush the cache.
+	 *
+	 * @return void
+	 */
+	public function flush_cache() {
+		do_action( 'cloudinary_flush_cache', false );
 	}
 
 	/**
diff --git a/readme.txt b/readme.txt
index 1cc03e8be..6c335b2fe 100644
--- a/readme.txt
+++ b/readme.txt
@@ -142,7 +142,14 @@ Your site is now setup to start using Cloudinary.
 
 == Changelog ==
 
-= 3.1 (22 FEBRUARY 2022) =
+= 3.1.1 (06 MARCH 2023) =
+
+Fixes and Improvements:
+
+* Fixed the *Add transformation* on the media library for newly added assets
+* Fixed PHP warning in error log after upgrading to PHP 8/8.X
+
+= 3.1 (22 FEBRUARY 2023) =
 
 Fixes and Improvements: