diff --git a/files/custom/Espo/Modules/DataMigration/Services/EntityImporter.php b/files/custom/Espo/Modules/DataMigration/Services/EntityImporter.php
index 9645bba..5bd0a3d 100644
--- a/files/custom/Espo/Modules/DataMigration/Services/EntityImporter.php
+++ b/files/custom/Espo/Modules/DataMigration/Services/EntityImporter.php
@@ -348,6 +348,11 @@ class EntityImporter
                 $value = json_encode($value, JSON_UNESCAPED_UNICODE);
             }
 
+            // Fix empty strings for integer/bool columns (MySQL strict mode)
+            if ($value === '' || $value === false) {
+                $value = null;
+            }
+
             $columns[] = "`{$column}`";
             $values[] = $value;
             $placeholders[] = '?';