I have what should be a super straight forward process. I copied an estimate via record.copy and I want to remove the lines to add in some different lines. When this tries to remove lines, i get an error of "You have attempted an invalid sublist or line item operation. You are either trying to access a field on a non-existent line or you are trying to add or remove lines from a static sublist.". This doesn't make any sense as this isn't a static sublist.