diff --git a/application/Espo/Classes/FieldValidators/EnumType.php b/application/Espo/Classes/FieldValidators/EnumType.php
index 89d8251dc8..4d4d2c8488 100644
--- a/application/Espo/Classes/FieldValidators/EnumType.php
+++ b/application/Espo/Classes/FieldValidators/EnumType.php
@@ -94,12 +94,6 @@ class EnumType
 
         $value = $entity->get($field);
 
-        // For bc.
-        // @todo Remove in v9.0.
-        if ($value === '') {
-            $value = null;
-        }
-
         return in_array($value, $optionList);
     }
 
diff --git a/application/Espo/Classes/FieldValidators/LinkMultipleType.php b/application/Espo/Classes/FieldValidators/LinkMultipleType.php
index c9101a95b7..33f0fc9884 100644
--- a/application/Espo/Classes/FieldValidators/LinkMultipleType.php
+++ b/application/Espo/Classes/FieldValidators/LinkMultipleType.php
@@ -276,12 +276,6 @@ class LinkMultipleType
             $optionList
         );
 
-        // For bc.
-        // @todo Remove in v9.0.
-        if ($value === '') {
-            $value = null;
-        }
-
         return in_array($value, $optionList);
     }
 }