fix sqlite3

Author: michalsn

system/Database/SQLite3/Connection.php

@@ -171,9 +171,10 @@ protected function execute(string $sql)
                 'trace'   => render_backtrace($e->getTrace()),
             ]);
 
+            $error     = $this->error();
             $exception = $this->isUniqueConstraintViolation($e->getMessage())
-                ? new UniqueConstraintViolationException($e->getMessage(), $e->getCode(), $e)
-                : new DatabaseException($e->getMessage(), $e->getCode(), $e);
+                ? new UniqueConstraintViolationException($e->getMessage(), $error['code'], $e)
+                : new DatabaseException($e->getMessage(), $error['code'], $e);
 
             if ($this->DBDebug) {
                 throw $exception;