Reading package lists... Error! p25link_2.40-6.deb and p25link_2.40-8.deb will not install

[ga900p25]

p25link_2.40-6.deb and p25link_2.40-8.deb produce the same error under DEBIAN 10.

root@sys:/opt# sudo apt install /opt/p25link_2.40-6.deb
Reading package lists... Error!
E: Sub-process Popen returned an error code (2)
E: Encountered a section with no Package: header
E: Problem with MergeList /opt/p25link_2.40-6.deb
E: The package lists or status file could not be parsed or opened.

root@sys:/opt# sudo apt install /opt/p25link_2.40-8.deb
Reading package lists... Error!
E: Sub-process Popen returned an error code (2)
E: Encountered a section with no Package: header
E: Problem with MergeList /opt/p25link_2.40-8.deb
E: The package lists or status file could not be parsed or opened.

Thanks,
Ken