I've just hit a wall, and after searching so much, haven't been able to figure out a solution for this.
root@server:# apt-get remove libapache2-mod-geoip
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
libapache2-mod-geoip
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 115kB disk space will be freed.
Do you want to continue [Y/n]? Y
(Reading database ... 64325 files and directories currently installed.)
Removing libapache2-mod-geoip ...
ERROR: Module geoip does not exist!
dpkg: error processing libapache2-mod-geoip (--remove):
subprocess installed post-removal script returned error exit status 1
Errors were encountered while processing:
libapache2-mod-geoip
E: Sub-process /usr/bin/dpkg returned an error code (1)
The package libapache2-mod-geoip isn't properly installed either, and I am unable to re-install it with dpkg-reconfigure or purge it using dpkg -P libapache2-mod-geoip. It gives me the same error.