diff --git a/src/packages/db-schema/1.0/core/dBuilder.php b/src/packages/db-schema/1.0/core/dBuilder.php
index 58d0857..fdab823 100644
--- a/src/packages/db-schema/1.0/core/dBuilder.php
+++ b/src/packages/db-schema/1.0/core/dBuilder.php
@@ -92,7 +92,6 @@
                 /* (2) Constraints */
                 $constraints = [
                     'primary'   => [],
-                    'foreign_k' => [],
                     'unique'    => [],
                     'default'   => [],
                 ];