Copying from sales document type L2 to RK is not supported

Dear Experts,

Can any guide me please regarding my issue,

My process is linked with service order,after creation of service order,I am going to DP90 Tcode with this it will generate debit memo request,and I will do the billing from vf01.

Now I want to make some invoice correction,

so I have copied the standard RK invoice correction document to ZRK

and i have assign this for my sales area in sales document header,

now I have raised the order from va01,and I have given the invoice document number,

its showing this error u201CCOPYING FROM SALES DOCUMENT TYPE L2 TO ZRK IS NOT SUPPORTEDu201D

for this I think I have to maintain the copy controls,

can any one help me out how to maintain the copy controls for invoice correction.