diff --git a/superset/databases/schemas.py b/superset/databases/schemas.py
index bd30ad4ec5..aa88822a85 100644
--- a/superset/databases/schemas.py
+++ b/superset/databases/schemas.py
@@ -626,6 +626,7 @@ class ImportV1DatabaseExtraSchema(Schema):
     cost_estimate_enabled = fields.Boolean()
     allows_virtual_table_explore = fields.Boolean(required=False)
     cancel_query_on_windows_unload = fields.Boolean(required=False)
+    disable_data_preview = fields.Boolean(required=False)
 
 
 class ImportV1DatabaseSchema(Schema):
diff --git a/superset/datasets/schemas.py b/superset/datasets/schemas.py
index 8a44da458f..38646471d0 100644
--- a/superset/datasets/schemas.py
+++ b/superset/datasets/schemas.py
@@ -144,7 +144,7 @@ class ImportV1ColumnSchema(Schema):
     @pre_load
     def fix_extra(self, data: Dict[str, Any], **kwargs: Any) -> Dict[str, Any]:
         """
-        Fix for extra initially beeing exported as a string.
+        Fix for extra initially being exported as a string.
         """
         if isinstance(data.get("extra"), str):
             data["extra"] = json.loads(data["extra"])
@@ -170,7 +170,7 @@ class ImportV1MetricSchema(Schema):
     @pre_load
     def fix_extra(self, data: Dict[str, Any], **kwargs: Any) -> Dict[str, Any]:
         """
-        Fix for extra initially beeing exported as a string.
+        Fix for extra initially being exported as a string.
         """
         if isinstance(data.get("extra"), str):
             data["extra"] = json.loads(data["extra"])
@@ -192,7 +192,7 @@ class ImportV1DatasetSchema(Schema):
     @pre_load
     def fix_extra(self, data: Dict[str, Any], **kwargs: Any) -> Dict[str, Any]:
         """
-        Fix for extra initially beeing exported as a string.
+        Fix for extra initially being exported as a string.
         """
         if isinstance(data.get("extra"), str):
             data["extra"] = json.loads(data["extra"])