diff --git a/system/Database/MigrationRunner.php b/system/Database/MigrationRunner.php
index 3f9a1fbe71c4..cf993c2c08e3 100644
--- a/system/Database/MigrationRunner.php
+++ b/system/Database/MigrationRunner.php
@@ -305,6 +305,9 @@ public function regress(int $targetBatch = 0, string $group = null)
 			throw new \RuntimeException($message);
 		}
 
+		// Save the namespace to restore it after loading migrations
+		$tmpNamespace = $this->namespace;
+
 		// Get all migrations
 		$this->namespace = null;
 		$allMigrations   = $this->findMigrations();
@@ -366,6 +369,9 @@ public function regress(int $targetBatch = 0, string $group = null)
 			}
 		}
 
+		// Restore the namespace
+		$this->namespace = $tmpNamespace;
+
 		return true;
 	}