diff --git a/apps/emqx_authn/src/simple_authn/emqx_authn_pgsql.erl b/apps/emqx_authn/src/simple_authn/emqx_authn_pgsql.erl
index 222dcc4db..6589fc8eb 100644
--- a/apps/emqx_authn/src/simple_authn/emqx_authn_pgsql.erl
+++ b/apps/emqx_authn/src/simple_authn/emqx_authn_pgsql.erl
@@ -76,8 +76,7 @@ create(#{query := Query0,
     ok = emqx_authn_password_hashing:init(Algorithm),
     {Query, PlaceHolders} = parse_query(Query0),
     ResourceId = emqx_authn_utils:make_resource_id(?MODULE),
-    State = #{query => Query,
-              placeholders => PlaceHolders,
+    State = #{placeholders => PlaceHolders,
               password_hash_algorithm => Algorithm,
               resource_id => ResourceId},
     case emqx_resource:create_local(ResourceId, emqx_connector_pgsql, Config#{named_queries => #{ResourceId => Query}}) of