system/Validation/Validation.php
public function reset(): ValidationInterface
	{
		$this->data         = [];
		$this->rules        = [];
		$this->errors       = [];
		$this->customErrors = [];

		return $this;
	}
public function reset(): ValidationInterface
	{
		$this->data         = [];
		$this->rules        = [];
		$this->errors       = [];
		$this->customErrors = [];

		return $this;
	}
Resets the class to a blank slate. Should be called whenever
you need to process more than one array.

@return \CodeIgniter\Validation\ValidationInterface