Can we generate eway bill for 1 month old invoice?

but system not taking old date

Old document date the Eway bill portal shall accept but Eway bill generated shall only be present date. 

i have generated wrong e waybill in last month and goods is dispatched to party eway bill generated for less amount. 

already one month is over, should we requires to regenerate the eway bill for difference amount . because party is asking for correct ewaybill.

so kindly clarify

If goods are already delivered to a the destination then there is no point in raising E-Way Bill now

Ihe  5 eway  nvoices  genrated but IRN no not genrated. For 4 invocess however the sales are recorded the process had been made through clearyax softwate can we re enter the invocess again 

E-way bills are invoices generated for more than a receipt of 50,000 or above. 

hi, we have 2 companies. by mistake i have raised eway bill from other company. after 8 days i came to know that i raised from wrong company. but material is already delivered. now customer is asking ewaybill from actual company. 

please 

give me action what can i do in both the companies