diff --git a/pages/UI.php b/pages/UI.php
index d30887e92..b58c5425f 100644
--- a/pages/UI.php
+++ b/pages/UI.php
@@ -842,7 +842,7 @@ try
 						$currValue = $oObj->Get($sAttCode);
 						if ($oAttDef instanceof AttributeCaseLog)
 						{
-							$currValue = '';
+							$currValue = ' '; // Don't put an empty string, in case the field would be considered as mandatory...
 						}
 						if (is_object($currValue)) continue; // Skip non scalar values...
 						if(!array_key_exists($currValue, $aValues[$sAttCode]))