diff --git a/apps/emqx_connector/src/emqx_connector.app.src b/apps/emqx_connector/src/emqx_connector.app.src
index d268a244a..9dcec9187 100644
--- a/apps/emqx_connector/src/emqx_connector.app.src
+++ b/apps/emqx_connector/src/emqx_connector.app.src
@@ -1,7 +1,7 @@
 %% -*- mode: erlang -*-
 {application, emqx_connector, [
     {description, "EMQX Data Integration Connectors"},
-    {vsn, "0.1.26"},
+    {vsn, "0.1.27"},
     {registered, []},
     {mod, {emqx_connector_app, []}},
     {applications, [
diff --git a/apps/emqx_connector/src/emqx_connector_pgsql.erl b/apps/emqx_connector/src/emqx_connector_pgsql.erl
index 71d18f4a8..c468aa8bd 100644
--- a/apps/emqx_connector/src/emqx_connector_pgsql.erl
+++ b/apps/emqx_connector/src/emqx_connector_pgsql.erl
@@ -69,7 +69,7 @@ roots() ->
 
 fields(config) ->
     [{server, server()}] ++
-        emqx_connector_schema_lib:relational_db_fields() ++
+        adjust_fields(emqx_connector_schema_lib:relational_db_fields()) ++
         emqx_connector_schema_lib:ssl_fields() ++
         emqx_connector_schema_lib:prepare_statement_fields().
 
@@ -77,6 +77,22 @@ server() ->
     Meta = #{desc => ?DESC("server")},
     emqx_schema:servers_sc(Meta, ?PGSQL_HOST_OPTIONS).
 
+adjust_fields(Fields) ->
+    lists:map(
+        fun
+            ({username, OrigUsernameFn}) ->
+                {username, fun
+                    (required) ->
+                        true;
+                    (Any) ->
+                        OrigUsernameFn(Any)
+                end};
+            (Field) ->
+                Field
+        end,
+        Fields
+    ).
+
 %% ===================================================================
 callback_mode() -> always_sync.
 
diff --git a/changes/ee/fix-11225.en.md b/changes/ee/fix-11225.en.md
new file mode 100644
index 000000000..8d7ad554f
--- /dev/null
+++ b/changes/ee/fix-11225.en.md
@@ -0,0 +1 @@
+Fix the `username` of PostgreSQL/Timescale/MatrixDB bridges could be empty