fix frozen field

Author: giancarloromeo

packages/models-library/src/models_library/api_schemas_webserver/projects.py

@@ -10,7 +10,7 @@
 from common_library.pydantic_basic_types import LongTruncatedStr, ShortTruncatedStr
 from models_library.folders import FolderID
 from models_library.workspaces import WorkspaceID
-from pydantic import Field, HttpUrl, field_validator
+from pydantic import ConfigDict, Field, HttpUrl, field_validator
 
 from ..api_schemas_long_running_tasks.tasks import TaskGet
 from ..emails import LowerCaseEmailStr
@@ -82,6 +82,10 @@ class ProjectGet(OutputSchema):
     workspace_id: WorkspaceID | None
     folder_id: FolderID | None
 
+    model_config = ConfigDict(
+        frozen=False
+    )
+
     _empty_description = field_validator("description", mode="before")(
         none_to_empty_str_pre_validator
     )