Hi all,
I follow the instructions at
https://www.qgis.org/en/site/forusers/alldownloads.html#debian-ubuntu, but
at the last it shows:
```shell
The following packages have unmet dependencies:
qgis : Depends: libqgis-3d3.16.2 but it is not going to be installed
Depends: libqgis-analysis3.16.2 but it is not going to be installed
Depends: libqgis-app3.16.2 but it is not going to be installed
Depends: libqgis-core3.16.2 but it is not going to be installed
Depends: libqgis-gui3.16.2 but it is not going to be installed
Depends: python3-qgis (= 1:3.16.2+28bionic) but
3.4.11+dfsg-2~bionic1 is to be installed
Depends: qgis-providers (= 1:3.16.2+28bionic) but it is not going
to be installed
qgis-plugin-grass : Depends: qgis-provider-grass (= 1:3.16.2+28bionic) but
3.4.11+dfsg-2~bionic1 is to be installed
Depends: grass740
Depends: libqgis-app3.16.2 but it is not going to be
installed
Depends: libqgis-core3.16.2 but it is not going to be
installed
Depends: libqgis-gui3.16.2 but it is not going to be
installed
Depends: libqgisgrass7-3.16.2 but it is not going to
be installed
E: Unable to correct problems, you have held broken packages.
```
What can I do to handle this? Thanks!
Best,
Han
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