I raised an issue with darktable when I encountered this issue with my TZ70 (here https://redmine.darktable.org/issues/11983) and was asked to raise the issue upstream with the lensfun project.
I raised the issue with lensfun (Lensfun data for Panasonic DMC-TZ70 / 71 · Issue #684 · lensfun/lensfun · GitHub) which has now been set to resolved. I haven’t tested myself, since I haven’t used the camera for a while, but you may just have to run the “lensfun‑update‑data” command to get the lensfun database updated on your system.
Failing that, running the above command will still create a copy of the correction data and tell you where it has been put. You can then edit the xml file manually.