sql server - For single insert Operation some Record inserting twice -


i have created 1 method insert_detail , in method 1 time insert operation perform each table based on condition record insert twice , make duplication in database , issue came 1 week only. please me find solution that. 

private sub insert_detail(mservice_order_no, mprod_code, malt_prod_code, mqty, mtype, mfrom_original_hub, maxno) on error goto errtrap     dim mcmt string     dim strsql$      if mfrom_original_hub = "true"         mcmt = "y"     else         mcmt = "n"     end if      strsql = ""     if mtype = "a"         strsql = "insert service_order_alt_parts(fk_num_service_ord_no,fk_var_orig_prod_code," & _             "fk_var_alt_prod_code,num_alt_prod_qty,num_flag,commited,from_cpl) " & _             "values('" & mservice_order_no & "','" & mprod_code & "','" & malt_prod_code & "'," & _             mqty & "," & maxno & ",'" & mcmt & "','true')"      elseif mtype = "r"         strsql = "insert service_order_repl_parts(fk_num_service_ord_no,fk_var_orig_prod_code," & _             "fk_var_repl_prod_code,num_repl_prod_qty,num_flag,commited,from_cpl) " & _             "values('" & mservice_order_no & "','" & mprod_code & "','" & malt_prod_code & "'," & _             mqty & "," & maxno & ",'" & mcmt & "','true')"     end if      if strsql <> "" conn.execute strsql  errtrap:     if err         if err.number <> 5555 _             call writetocommonlog("insert_detail", err.number & ": " & err.description & " - " & strsql)          err.raise 55555, , ""     end if end sub

and calling insert_detail in:-

if mstock_found = true     search_for_alternate_parts_from_cpl = 1      maxno = get_max_no(mservice_order_no, mprod_code, "a")     = 1 alt_collection.count         call add_parts_to_collection(alt_collection.item(i), "a", alt_qty_collection.item(i))         call insert_detail(mservice_order_no, mprod_code, alt_collection.item(i), alt_qty_collection.item(i), "a", mfrom_original_hub, maxno)          call writetodebuglog("search_for_alternate_parts_from_cpl -> stockfound", mservice_order_no & " : " & mprod_code & " : (a)" & alt_collection.item(i) & " : " & alt_qty_collection.item(i) & " : " & mfrom_original_hub)         if mfrom_original_hub = "true"             str3 = "update product (rowlock) set commited=commited + " & cint(alt_qty_collection.item(i)) & " productcode='" & alt_collection.item(i) & "' , whseid='" & mwhseid & "'"             conn.execute (str3)         end if     next      if mfrom_original_hub = "true"         str3 = "update service_order_detail (rowlock) set chr_ignore='y' fk_num_service_ord_no='" & mservice_order_no & "' , fk_var_orig_prod_code='" & mprod_code & "' "         conn.execute (str3)          str3 = "update service_order_alt_parts (rowlock) set chr_ignore='y' fk_num_service_ord_no='" & mservice_order_no & "' , fk_var_orig_prod_code='" & mprod_code & "' , num_flag <>" & maxno         conn.execute (str3)     end if      set alt_collection = nothing     set alt_qty_collection = nothing else     set alt_collection = nothing     set alt_qty_collection = nothing      search_for_alternate_parts_from_cpl = 0 end if


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