It would appear the FA version:
pi@rpi4-20210823:~$ apt-cache policy dump1090-fa
dump1090-fa:
Installed: 6.0~dev
Candidate: 6.0~dev
Version table:
*** 6.0~dev 100
100 /var/lib/dpkg/status
pi@rpi4-20210823:~$ apt-cache policy piaware
piaware:
Installed: 5.0
Candidate: 5.0
Version table:
*** 5.0 100
100 /var/lib/dpkg/status
pi@rpi4-20210823:~$
