I’m fine with the new proposal, +1. We have currently 242 issues with resolution = "Solved By" AND fixVersion is EMPTY . I’m not sure we want to set a fix version for all of them, but I would suggest to at least fix the 11 of them that have a “security” label.
I mean in theory, everything that doesn’t fulfill the criteria I mentioned should probably be closed as a duplicate and not as “Solved by”, anyways, so in the end I think the proposals are not that different.