diff --git a/CHANGELOG b/CHANGELOG
index 47120380..1b8873e8 100755
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,11 @@
 # Changelog
 
+## v2.3.1
+
+### Bug fixes
+
+- Overriding deployed models.
+
 ## v2.3.0
 
 ### Improvements
diff --git a/tabpy/VERSION b/tabpy/VERSION
index cc6612c3..a6254504 100755
--- a/tabpy/VERSION
+++ b/tabpy/VERSION
@@ -1 +1 @@
-2.3.0
\ No newline at end of file
+2.3.1
\ No newline at end of file
diff --git a/tabpy/tabpy_server/handlers/base_handler.py b/tabpy/tabpy_server/handlers/base_handler.py
index ecffa499..26a86916 100644
--- a/tabpy/tabpy_server/handlers/base_handler.py
+++ b/tabpy/tabpy_server/handlers/base_handler.py
@@ -145,7 +145,6 @@ def error_out(self, code, log_message, info=None):
                 code, log_message, info
             ),
         )
-        self.finish()
 
     def options(self):
         # add CORS headers if TabPy has a cors_origin specified
diff --git a/tabpy/tabpy_server/management/state.py b/tabpy/tabpy_server/management/state.py
index 424d3b16..12a5052b 100644
--- a/tabpy/tabpy_server/management/state.py
+++ b/tabpy/tabpy_server/management/state.py
@@ -174,9 +174,9 @@ def _check_and_set_endpoint_type(self, endpoint_type, defaultValue):
         return self._check_and_set_endpoint_str_value(
             endpoint_type, "endpoint type", defaultValue)
 
-    def _check_and_set_target(self, target, defaultValue):
-        return self._check_and_set_endpoint_str_value(
-            target, "target", defaultValue)
+    def _check_target(self, target):
+        if target and not isinstance(target, str):
+            raise ValueError("target must be a string.")
 
     def _check_and_set_dependencies(self, dependencies, defaultValue):
         if not dependencies:
@@ -232,7 +232,7 @@ def add_endpoint(
             endpoint_type = self._check_and_set_endpoint_type(endpoint_type, None)
             dependencies = self._check_and_set_dependencies(dependencies, [])
 
-            target = self._check_and_set_target(target, "")
+            self._check_target(target)
             if target and target not in endpoints:
                 raise ValueError("target endpoint is not valid.")
 
@@ -331,7 +331,7 @@ def update_endpoint(
             dependencies = self._check_and_set_dependencies(
                 dependencies, endpoint_info.get("dependencies", []))
 
-            target = self._check_and_set_target(target, None)
+            self._check_target(target)
             if target and target not in endpoints:
                 raise ValueError("target endpoint is not valid.")
             elif not target:
diff --git a/tests/integration/test_deploy_model_ssl_on_auth_on.py b/tests/integration/test_deploy_model_ssl_on_auth_on.py
index af141b72..037f6de6 100644
--- a/tests/integration/test_deploy_model_ssl_on_auth_on.py
+++ b/tests/integration/test_deploy_model_ssl_on_auth_on.py
@@ -45,3 +45,36 @@ def test_deploy_ssl_on_auth_on(self):
                 headers=headers,
             )
             self.assertEqual(200, m_response.status_code)
+
+    def test_override_model_ssl_on_auth_on(self):
+        # Uncomment the following line to preserve
+        # test case output and other files (config, state, ect.)
+        # in system temp folder.
+        # self.set_delete_temp_folder(False)
+
+        self.deploy_models(self._get_username(), self._get_password())
+
+        # Override models
+        self.deploy_models(self._get_username(), self._get_password())
+
+        headers = {
+            "Content-Type": "application/json",
+            "TabPy-Client": "Integration test for deploying models with auth",
+            "Authorization": "Basic "
+            + base64.b64encode("user1:P@ssw0rd".encode("utf-8")).decode("utf-8"),
+        }
+
+        session = requests.Session()
+        # Do not verify servers' cert to be signed by trusted CA
+        session.verify = False
+        # Do not warn about insecure request
+        requests.packages.urllib3.disable_warnings()
+
+        models = ["PCA", "Sentiment%20Analysis", "ttest", "anova"]
+        for m in models:
+            m_response = session.get(
+                url=f"{self._get_transfer_protocol()}://"
+                f"localhost:9004/endpoints/{m}",
+                headers=headers,
+            )
+            self.assertEqual(200, m_response.status_code)