Hi,
I'm afraid that I wasn't clear enough.
The support of "check duplicate" has been integrated in the HikaSerial source code end of July.
Right now, I have to see if I just try to publish "HikaSerial 1.10.5" or if I finish my developments and a major release.
HikaSerial 1.10.4 has been release and his code is fixed ; I do not update a package several months after his release.
At least if we found a important bug, we release a new minor release ; but in all cases updates are coming from new releases.
Regards,