diff --git a/src/DatabaseSettingStore.php b/src/DatabaseSettingStore.php
index 5abea1d..6644698 100644
--- a/src/DatabaseSettingStore.php
+++ b/src/DatabaseSettingStore.php
@@ -117,6 +117,7 @@ public function setConstraint(\Closure $callback)
 	 */
 	public function setExtraColumns(array $columns)
 	{
+		$this->forgetAll();
 		$this->extraColumns = $columns;
 	}