Unable to create number sequence for workflow in AX 2012

Hi, when i try to create a number sequence for workflow or Instance ID, i am getting the following error - I set the scope to shared and added a segment with alpha ‘######’

start 1; 999999; next: 2

When I try to add reference -: workflow & workflow ID, following error is reported:

Cannot create a record in Number sequence references (NumberSequenceReference). Datatype number sequence properties: 4873.The record already exists.

Any idea how to get around this? We are not able to add any workflow!

many thanks

it had to be set up from system parameters. solved.