diff --git a/includes/class-dispatcher.php b/includes/class-dispatcher.php
index 8a6628a39..b9fb198cd 100644
--- a/includes/class-dispatcher.php
+++ b/includes/class-dispatcher.php
@@ -104,6 +104,7 @@ public static function process_outbox( $id ) {
 		} else {
 			// No followers to process for this update. We're done.
 			\wp_publish_post( $outbox_item );
+			\delete_post_meta( $outbox_item->ID, '_activitypub_outbox_offset' );
 		}
 	}
 
diff --git a/includes/collection/class-outbox.php b/includes/collection/class-outbox.php
index d00b702c2..e8332e4c0 100644
--- a/includes/collection/class-outbox.php
+++ b/includes/collection/class-outbox.php
@@ -121,10 +121,9 @@ private static function invalidate_existing_items( $object_id, $activity_type, $
 			)
 		);
 
-		if ( $existing_items ) {
-			foreach ( $existing_items as $existing_item_id ) {
-				\wp_publish_post( $existing_item_id );
-			}
+		foreach ( $existing_items as $existing_item_id ) {
+			\wp_publish_post( $existing_item_id );
+			\delete_post_meta( $existing_item_id, '_activitypub_outbox_offset' );
 		}
 	}
 }