The Software Version field should be used to identify the commit when the bug was introduced (perhaps the very first commit that introduced the entire thing in which the bug is found or perhaps a regressing commit). The way it's typically used is not helpful: namely that the user who reports the bug just fills in the version they happen to be running when it happened.
There should be an Introduced-in Version and Fixed-in Version.
These fields aren't required for a good ticket system to work. They might be useful in terms of post-mortems, generating changelogs, etc. But fundamentally, the "version" that a issue was resolved in is not a requirement of the ticket tracking system. Some continuously deployed software doesn't really ever have a version number at all.
There should be an Introduced-in Version and Fixed-in Version.