Merge pull request #31437 from colemanw/fixContactRefAgainBP

Fix #5555 - Saving empty multiselect contact reference field

CRM/Core/BAO/CustomValueTable.php

@@ -131,13 +131,13 @@ class CRM_Core_BAO_CustomValueTable {
                   $value = NULL;
                 }
               }
-              elseif ($value == NULL || $value === '') {
-                $type = 'Timestamp';
-                $value = NULL;
-              }
               else {
                 $type = 'Integer';
               }
+              if ($value == NULL || $value === '') {
+                $type = 'Timestamp';
+                $value = NULL;
+              }
               break;
 
             case 'EntityReference':