diff --git a/superset-frontend/src/views/CRUD/data/database/DatabaseModal/index.tsx b/superset-frontend/src/views/CRUD/data/database/DatabaseModal/index.tsx
index 634ad8ee5ef..8e047be4b9e 100644
--- a/superset-frontend/src/views/CRUD/data/database/DatabaseModal/index.tsx
+++ b/superset-frontend/src/views/CRUD/data/database/DatabaseModal/index.tsx
@@ -257,9 +257,8 @@ function dbReducer(
           ...JSON.parse(action.payload.extra || ''),
           metadata_params: JSON.stringify(extra_json?.metadata_params),
           engine_params: JSON.stringify(extra_json?.engine_params),
-          schemas_allowed_for_csv_upload: JSON.stringify(
+          schemas_allowed_for_csv_upload:
             extra_json?.schemas_allowed_for_csv_upload,
-          ),
         };
       }
 
diff --git a/superset/models/core.py b/superset/models/core.py
index 20ba0e5a754..ef3cd55426c 100755
--- a/superset/models/core.py
+++ b/superset/models/core.py
@@ -20,6 +20,7 @@ import enum
 import json
 import logging
 import textwrap
+from ast import literal_eval
 from contextlib import closing
 from copy import deepcopy
 from datetime import datetime
@@ -668,6 +669,10 @@ class Database(
         self,
     ) -> List[str]:
         allowed_databases = self.get_extra().get("schemas_allowed_for_csv_upload", [])
+
+        if isinstance(allowed_databases, str):
+            allowed_databases = literal_eval(allowed_databases)
+
         if hasattr(g, "user"):
             extra_allowed_databases = config["ALLOWED_USER_CSV_SCHEMA_FUNC"](
                 self, g.user