This sounds similar to what we recently fixed with bug 1074484 where deleted CNs were being used on bib merge. That said, I think it's slightly different if you're saying the prefixes are distinct, which makes me wonder if there's a larger issue where we need to check for prefix/suffix in relation to the labels when determining merge choices.
This sounds similar to what we recently fixed with bug 1074484 where deleted CNs were being used on bib merge. That said, I think it's slightly different if you're saying the prefixes are distinct, which makes me wonder if there's a larger issue where we need to check for prefix/suffix in relation to the labels when determining merge choices.