Merge pull request #8832 from annando/fix-db-error

Fix database error ""Unknown column 'parent-item.author-id'"

src/Model/Item.php

@@ -787,12 +787,12 @@ class Item
 			$joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 		}
 
-		if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
+		if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-item-author`.") !== false)) {
 			$joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
-		}
 
-		if (strpos($sql_commands, "`parent-item-author`.") !== false) {
-			$joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
+			if (strpos($sql_commands, "`parent-item-author`.") !== false) {
+				$joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
+			}
 		}
 
 		return $joins;