Tax Invoice and E-way Bill date time gap of 1 week or a month

Subodh KS (44 Points)

20 March 2021  
If the invoice is few weeks apart from the ewaybill is there a complication. The invoice was made in advance to get the payment due to request of client and we have charged GST. But the material is still lying with us awaiting payment. Can we make Ewaybill on this same invoice after few weeks?
Will there be any complications?