New advisory for invoice no by gstn

Resp All,

As you all aware that new advisory released by GSTN regrading Serial number of Invoice for this year.2019-20

We wish to mention here that we have 2 mfrg unit hence we can not use only serial number in Invoice number but looking the advisory not to put alphabets we are in trouble. Please advise on this issue. 

Previously we are using 1819M001  to 1819M100 for M unit and 1819G001 to 1819G100 for G unit.

Please advise on this issue. Thanks in advance.

Suresh Jain