Replacing an aggregate with a new version doesn't reset INITCOND

use simplex;
      CREATE FUNCTION state_group_and_sum(state map<int, int>, star_rating int)
                      CALLED ON NULL INPUT
                      RETURNS map<int, int>
                      LANGUAGE java
                      AS 'if (state.get(star_rating) == null) state.put(star_rating, 1); else state.put(star_rating, ((Integer) state.get(star_rating)) + 1); return state;';
      CREATE FUNCTION percent_stars(state map<int,int>)
                      RETURNS NULL ON NULL INPUT
                      RETURNS map<int, int>
                      LANGUAGE java AS $$
Integer sum = 0; 
for(Object k : state.keySet()) { 
    sum = sum + (Integer) state.get((Integer) k);
}
java.util.Map<Integer, Integer> results = new java.util.HashMap<Integer, Integer>();
for(Object k : state.keySet()) {
    results.put((Integer) k, ((Integer) state.get((Integer) k))*100 / sum);
}
return results;
$$;

CREATE OR REPLACE AGGREGATE group_and_sum(int)
                    SFUNC state_group_and_sum
                    STYPE map<int, int>
                    FINALFUNC percent_stars
                    INITCOND {}

CREATE OR REPLACE AGGREGATE group_and_sum(int)
                    SFUNC state_group_and_sum
                    STYPE map<int, int>
                    FINALFUNC percent_stars
                    INITCOND NULL