solr.py is a derivative of work published under the Apache Software Licence, but collective.solr is released under the GPLv2. The Free Software Foundation considers all versions of the Apache License to be incompatible with the previous GPL versions 1 and 2.
The simplest way to fix this is to change the license of collective.solr to be GPL3.
solr.py is a derivative of work published under the Apache Software Licence, but collective.solr is released under the GPLv2. The Free Software Foundation considers all versions of the Apache License to be incompatible with the previous GPL versions 1 and 2.
The simplest way to fix this is to change the license of collective.solr to be GPL3.