Error IW457 - Settlement area 01 for controlling area 1500 not maintained Message no.iw457

While creating a Maintenance Order I am facing the below mentioned error

Settlement area 01 for controlling area 1500 not maintained

Message no. IW457

Diagnosis

The allocation group does not exist in your system.

Procedure

Processing will be continued when you press Continue.

The allocation group serves to bundle the function orders for settlement.

Could anyone tell me what is the problem resoulution,

Thanks

Omer Saeed