[server/querier] stop passing a rqlst to empty_rset (py.warnings) WARNING: /home/jcr/src/cw/cubicweb/server/querier.py:46: DeprecationWarning: [3.20] rqlst parameter is deprecated return ResultSet([], rql, args, rqlst=rqlst)

raise NotImplementedError("Cannot migrate such an old version. Use intermediate Cubiweb version (try 3.16.x)")