diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 6e99046..7f35fa6 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -52,7 +52,7 @@ repos:
     rev: 6.1.0
     hooks:
       - id: flake8
-        additional_dependencies: [Flake8-pyproject]
+        additional_dependencies: [ Flake8-pyproject ]
         args: [ --max-line-length=120 ]
   - repo: https://github.com/pre-commit/mirrors-mypy
     rev: v1.7.0
@@ -60,7 +60,7 @@ repos:
       - id: mypy
         language: system
         pass_filenames: false
-        args: ['.']
+        args: [ '.' ]
   - repo: https://github.com/PyCQA/pylint
     rev: v3.0.1
     hooks:
@@ -74,11 +74,6 @@ repos:
         entry: pydocstyle
         language: python
         types: [ python ]
-  - repo: https://github.com/PyCQA/docformatter
-    rev: v1.7.5
-    hooks:
-      - id: docformatter
-        args: ['--wrap-summaries', '120', '--in-place', '--wrap-descriptions', '120', '--in-place']
   - repo: https://github.com/jendrikseipp/vulture
     rev: v2.10
     hooks:
diff --git a/ontouml_py/classes/ontoumlelement.py b/ontouml_py/classes/ontoumlelement.py
index e8c4c7f..f2d9e7d 100644
--- a/ontouml_py/classes/ontoumlelement.py
+++ b/ontouml_py/classes/ontoumlelement.py
@@ -2,9 +2,8 @@
 
 It includes attributes for unique identification, creation, and modification timestamps, ensuring these properties are
 present across all OntoUML elements. The class also incorporates validations to enforce the integrity of these
-attributes.
+attributes and restricts direct modification of certain fields.
 """
-import typing
 import uuid
 from abc import ABC, abstractmethod
 from datetime import datetime
@@ -19,14 +18,18 @@
 class OntoumlElement(ABC, BaseModel):
     """Abstract base class representing a generic element within an OntoUML model.
 
-    This class provides base features for OntoUML elements, including a unique identifier, timestamps for creation and
-    modification, and a relationship to OntoUML projects.
-
-    :ivar id: A unique identifier for the element, automatically generated upon instantiation. :vartype id: str :ivar
-    created: Timestamp when the element was created, defaults to the current time. :vartype created: datetime :ivar
-    modified: Timestamp when the element was last modified, can be None if not modified. :vartype modified:
-    Optional[datetime] :ivar in_project: List of projects this element is part of. Direct modification is restricted.
-    :vartype in_project: list['Project']
+    Provides base features for OntoUML elements, including a unique identifier, timestamps for creation and
+    modification, and a relationship to OntoUML projects. It enforces read-only constraints on certain attributes and
+    includes validation logic to maintain the integrity of these attributes.
+
+    :ivar id: A unique identifier for the element, automatically generated upon instantiation.
+    :vartype id: str
+    :ivar created: Timestamp when the element was created, defaults to the current time.
+    :vartype created: datetime
+    :ivar modified: Timestamp when the element was last modified, can be None if not modified.
+    :vartype modified: Optional[datetime]
+    :ivar in_project: List of projects this element is part of. Direct modification is restricted.
+    :vartype in_project: list[Project]
     """
 
     id: str = Field(default_factory=lambda: str(uuid.uuid4()))
@@ -39,7 +42,7 @@ class OntoumlElement(ABC, BaseModel):
         "validate_assignment": True,
         "extra": "forbid",
         "str_strip_whitespace": True,
-        "validate_all": True,
+        "validate_default": True,
     }
 
     @abstractmethod
@@ -49,7 +52,7 @@ def __init__(self, **data: dict[str, Any]) -> None:
         Ensures that 'modified' is not earlier than 'created' and prevents direct initialization of 'in_project'.
 
         :param data: Fields to be set on the model instance, excluding 'in_project'.
-        :type data: dict
+        :type data: dict[str, Any]
         :raises ValueError: If 'modified' is set to a datetime earlier than 'created', or if 'in_project' is directly
             initialized.
         """
@@ -81,10 +84,10 @@ def __init__(self, **data: dict[str, Any]) -> None:
                 "This operation should be done via class Project."
             )
 
-    def __setattr__(self, key: str, value: typing.Any) -> None:
-        """Set attribute values, enforcing read-only constraints and logical validation.
+    def __setattr__(self, key: str, value: Any) -> None:
+        """Set attribute values, enforcing logical validation.
 
-        Prevents modification of 'id', 'created', and 'in_project'. Validates 'modified' against 'created'.
+        Prevents modification of 'in_project'. Validates 'modified' against 'created'.
 
         :param key: The attribute name to set.
         :type key: str
@@ -92,8 +95,6 @@ def __setattr__(self, key: str, value: typing.Any) -> None:
         :type value: Any
         :raises ValueError: If trying to modify read-only fields or if 'modified' is set earlier than 'created'.
         """
-        if key in ["id", "created"] and hasattr(self, key):
-            raise ValueError(f"Attribute '{key}' is read-only and cannot be modified.")
         if key == "in_project" and hasattr(self, key):
             raise ValueError(
                 "Attribute 'in_project' cannot be modified via OntoumlElement. "