Index: core/kernel/utility/temp_handler.php
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- core/kernel/utility/temp_handler.php	(revision 15932)
+++ core/kernel/utility/temp_handler.php	(revision )
@@ -1374,6 +1374,16 @@
 	{
 		parent::__construct($prefix, $ids);
 
+		// editing sub-item, linked to multiple parents directly
+		if ( is_array($this->_foreignKey) ) {
+			$this->_multipleParents = true;
+			$this->_foreignKey = reset($this->_foreignKey);
+		}
+
+		if ( is_array($this->_parentTableKey) ) {
+			$this->_parentTableKey = reset($this->_parentTableKey);
+		}
+
 		$this->_setAsLastUsed();
 		$this->_addSubTables();
 	}
\ No newline at end of file