during cancelation of MIRO document giving error message "RG23 Part II post

Dear guru's,

I am facing a tipical issue while i am going to reverse the MIRO document it is giving error "RG23 Part II posting not yet done" .

Senario is -- user has created MIGO with Myp103 and then 105, system promted excise tab and excise ref. and excise date is their .

But no Part1 generated.

So no part2 .

Now A/c has passed the bill and fi doc generated. Now we want revrse this bill (MIRO) and respectively MIGO (105/103 ) and again capture it with correct excise entry.

we want to understand, How this happned at 105 why part1 not generated and with out part2 how bill passed.

now waht can bo done to reverse this.

thanks in advance.

Ajeet