Job work serial No.

Hello,

Is it mandatory to maintain delivery challan no. in sequence when we send material for Job work process.

E.g. On 01/01/2019 Material is send for jobwork with delivery challan no. JOBWORK001

and on 10/01/2019 I send material for jobwork to another jobworker with delivery challan no. JOBWORK005.

I am not maintaining delivery challan no. in sequence.

Is it valid?

Please suggest as per GST law.