diff --git a/includes/admin/feedzy-rss-feeds-import.php b/includes/admin/feedzy-rss-feeds-import.php
index c1cb6541..ae9301f7 100644
--- a/includes/admin/feedzy-rss-feeds-import.php
+++ b/includes/admin/feedzy-rss-feeds-import.php
@@ -1528,9 +1528,10 @@ private function run_job( $job, $max ) {
 			$items_found[ $item['item_url'] ] = $item['item_title'];
 
 			$duplicate_tag_value = array();
+			$mark_duplicate_key  = 'item_url';
 			if ( 'yes' === $import_remove_duplicates && ! $is_duplicate ) {
 				if ( ! empty( $mark_duplicate_tag ) ) {
-					$mark_duplicate_tag  = explode( ',', $mark_duplicate_tag );
+					$mark_duplicate_tag  = is_string( $mark_duplicate_tag ) ? explode( ',', $mark_duplicate_tag ) : $mark_duplicate_tag;
 					$mark_duplicate_tag  = array_map( 'trim', $mark_duplicate_tag );
 					$duplicate_tag_value = array_map(
 						function ( $tag ) use ( $item_obj, $item ) {
@@ -1547,16 +1548,15 @@ function ( $tag ) use ( $item_obj, $item ) {
 				if ( ! empty( $duplicate_tag_value ) ) {
 					$duplicate_tag_value = implode( ' ', $duplicate_tag_value );
 					$duplicate_tag_value = substr( sanitize_key( wp_strip_all_tags( $duplicate_tag_value ) ), 0, apply_filters( 'feedzy_mark_duplicate_content_limit', 256 ) );
-					$mark_duplicate_tag  = md5( implode( '', $mark_duplicate_tag ) );
+					$mark_duplicate_key  = 'mark_duplicate';
 				} else {
 					$duplicate_tag_value = esc_url_raw( $item['item_url'] );
-					$mark_duplicate_tag  = 'item_url';
 				}
-
-				$is_duplicate_post = $this->is_duplicate_post( $import_post_type, 'feedzy_' . $mark_duplicate_tag, $duplicate_tag_value );
+				$is_duplicate_post = $this->is_duplicate_post( $import_post_type, 'feedzy_' . $mark_duplicate_key, $duplicate_tag_value );
 				if ( ! empty( $is_duplicate_post ) ) {
 					foreach ( $is_duplicate_post as $p ) {
-						$found_duplicates[] = get_post_meta( $p, 'feedzy_' . $mark_duplicate_tag, true );
+						$found_duplicates[ $item_hash ]  = get_post_meta( $p, 'feedzy_' . $mark_duplicate_key, true );
+						$duplicates[ $item['item_url'] ] = $item['item_title'];
 						wp_delete_post( $p, true );
 					}
 				}
@@ -2091,9 +2091,9 @@ function( $term ) {
 			update_post_meta( $new_post_id, 'feedzy_job', $job->ID );
 			update_post_meta( $new_post_id, 'feedzy_item_author', sanitize_text_field( $author ) );
 
-			// Verify that the `$mark_duplicate_tag` does not match `'item_url'` to ensure the condition applies only when a different tag is specified.
-			if ( $mark_duplicate_tag && 'item_url' !== $mark_duplicate_tag ) {
-				update_post_meta( $new_post_id, 'feedzy_' . $mark_duplicate_tag, $duplicate_tag_value );
+			// Verify that the `$mark_duplicate_key` does not match `'item_url'` to ensure the condition applies only when a different tag is specified.
+			if ( $mark_duplicate_key && 'item_url' !== $mark_duplicate_key ) {
+				update_post_meta( $new_post_id, 'feedzy_' . $mark_duplicate_key, $duplicate_tag_value );
 			}
 
 			// we can use this to associate the items that were imported in a particular run.
diff --git a/tests/test-import.php b/tests/test-import.php
index be6c316f..2cb08b9e 100644
--- a/tests/test-import.php
+++ b/tests/test-import.php
@@ -249,7 +249,7 @@ public function test_feedzy_imports( $random_name1, $random_name2, $urls, $magic
 
 		// Check found duplicates items.
 		if ( $check_duplicate ) {
-			$this->assertNotEmpty( get_post_meta( $created[0]->ID, 'feedzy_' . md5( 'item_author' ), true ) );
+			$this->assertNotEmpty( get_post_meta( $created[0]->ID, 'feedzy_mark_duplicate', true ) );
 		}
 
 		// Check Post Delete