Number range for trans./event type WE in year 2008 does not exist ?

Hi,

When I post goods receipt ( MIGO) I got the error :

Number range for trans./event type WE in year 2008 does not exist

When I modify with OMBT ==>

1999 0002000000 0002999999 0

2008 8000000000 9999999999 8000000000

But I still get the same error , So Could you please help me this ?

Thanks