I created a trigger function. When I insert a row to table. I get an error. Geom, k1k, k20k and pro_clustur_id are default empty. When a row is inserted trigger is fired. How can I solve this problem?

Failed to execute SQL. Error: ERROR: function st_point(double precision, double precision) does not exist LINE 1: ...denem_project set geom = st_transform(st_setsrid(st_point(p... ^ HINT: No function matches the given name and argument types. You might need to add explicit type casts. QUERY: update denem.denem_project set geom = st_transform(st_setsrid(st_point(project_lng, project_lat), 4326), 500000) where id is not null and pro_cluster_id is null and project_lng is not null and project_lat is not null CONTEXT: PL/pgSQL function create_cluster_id() line 4 at SQL statement

CREATE OR REPLACE FUNCTION denem.create_cluster_id()
  RETURNS trigger AS $$
BEGIN
    IF TG_OP = 'INSERT' THEN
        update denem.denem_project  set geom = st_transform(st_setsrid(st_point(project_lng, project_lat), 4326), 500000) where id is not null and pro_cluster_id is null and project_lng is not null and project_lat is not null ;
        update denem.denem_project t1 set k20k=t2.fish_id from spatial.fish_net_k20k t2 where id is not null and pro_cluster_id is null and st_intersects(t1.geom,t2.geom) and k20k is null  ;
        update denem.denem_project t1 set  k1k=t2.fish_id from spatial.fish_net_k1k  t2 where id is not null and pro_cluster_id is null and st_intersects(t1.geom,t2.geom) and k1k is null ;
        update denem.denem_project set pro_cluster_id= (id||''||k20k)::bigint where id is not null and pro_cluster_id is null and  k20k is not null; 
    END IF;
  RETURN NEW;
 END;
 $$ language 'plpgsql';

CREATE TRIGGER create_cluster_id
  AFTER INSERT
  ON denem.denem_project
  FOR EACH ROW
  EXECUTE PROCEDURE denem.create_cluster_id();