diff --git a/src/dabmodel/__init__.py b/src/dabmodel/__init__.py
index 1d734d8..1c243d4 100644
--- a/src/dabmodel/__init__.py
+++ b/src/dabmodel/__init__.py
@@ -15,8 +15,8 @@ from .__metadata__ import __version__, __Summuary__, __Name__
 
 from .meta.element import ClassMutable, ObjectMutable
 from .element import Element
-from .LAMFields.LAMField import LAMField
-from .LAMFields.LAMFieldInfo import LAMFieldInfo
+from .lam_field.lam_field import LAMField
+from .lam_field.lam_field_info import LAMFieldInfo
 
 # from .LAMFields.FrozenLAMField import FrozenLAMField
 from .appliance import Appliance
diff --git a/src/dabmodel/base_element.py b/src/dabmodel/base_element.py
index 85875bd..95736b7 100644
--- a/src/dabmodel/base_element.py
+++ b/src/dabmodel/base_element.py
@@ -1,7 +1,7 @@
 from typing import Any
 
 # from .LAMFields.FrozenLAMField import FrozenLAMField
-from .LAMFields.LAMField import LAMField
+from .lam_field.lam_field import LAMField
 from .exception import ReadOnlyField, NewFieldForbidden, SchemaViolation
 from .tools import LAMdeepfreeze, is_data_attribute
 
diff --git a/src/dabmodel/LAMFields/__init__.py b/src/dabmodel/lam_field/__init__.py
similarity index 100%
rename from src/dabmodel/LAMFields/__init__.py
rename to src/dabmodel/lam_field/__init__.py
diff --git a/src/dabmodel/LAMFields/Constraint.py b/src/dabmodel/lam_field/constraint.py
similarity index 100%
rename from src/dabmodel/LAMFields/Constraint.py
rename to src/dabmodel/lam_field/constraint.py
diff --git a/src/dabmodel/LAMFields/LAMField.py b/src/dabmodel/lam_field/lam_field.py
similarity index 85%
rename from src/dabmodel/LAMFields/LAMField.py
rename to src/dabmodel/lam_field/lam_field.py
index 9dea20d..5ac08dd 100644
--- a/src/dabmodel/LAMFields/LAMField.py
+++ b/src/dabmodel/lam_field/lam_field.py
@@ -1,7 +1,8 @@
 from typing import Generic, TypeVar, Optional, Any, Self
 from typeguard import check_type, CollectionCheckStrategy, TypeCheckError
-from .LAMFieldInfo import LAMFieldInfo
-from .Constraint import Constraint
+from copy import deepcopy
+from .lam_field_info import LAMFieldInfo
+from .constraint import Constraint
 from ..tools import LAMdeepfreeze
 from ..exception import InvalidFieldValue, ReadOnlyField
 
@@ -15,14 +16,11 @@ class LAMField(Generic[TV_LABField]):
     def __init__(self, name: str, v: Optional[TV_LABField], a: Any, i: LAMFieldInfo):
         self.__name: str = name
         self.__source: Optional[type] = None
-        self.__info: LAMFieldInfo = i
+        self.__info: LAMFieldInfo = deepcopy(i)
         self.__annotations: Any = LAMdeepfreeze(a)
         self.validate(v)
         self.__default_value: Optional[TV_LABField] = v
         self.__value: Optional[TV_LABField] = v
-        self.__constraints: list[Constraint[Any]] = i.constraints
-        self.__frozen_constraints_set = False
-        self.__frozen_constraints = ()
         self.__frozen = False
         self.__frozen_value = None
         self.__frozen_value_set = False
@@ -41,7 +39,7 @@ class LAMField(Generic[TV_LABField]):
     def add_source(self, s: type) -> None:
         """Adds source Appliance to the Field"""
         if self.__frozen:
-            raise ReadOnlyField("Field is frozen")
+            raise ReadOnlyField("Field is frozen, cannot add source now")
         self.__source = s
 
     @property
@@ -53,16 +51,12 @@ class LAMField(Generic[TV_LABField]):
         """Adds constraint to the Field"""
         if self.__frozen:
             raise ReadOnlyField("Field is frozen")
-        self.__constraints.append(c)
-        self.__frozen_constraints_set = False
+        self.__info.add_constraint(c)
 
     @property
     def constraints(self) -> list[Constraint]:
         """Returns Field's constraint"""
-        if not self.__frozen_constraints_set:
-            self.__frozen_constraints = LAMdeepfreeze(self.__info.constraints)
-            self.__frozen_value_set = True
-        return self.__frozen_constraints
+        return LAMdeepfreeze(self.__info.constraints)
 
     def validate_self(self):
         self.validate(self.__value)
diff --git a/src/dabmodel/LAMFields/LAMFieldInfo.py b/src/dabmodel/lam_field/lam_field_info.py
similarity index 64%
rename from src/dabmodel/LAMFields/LAMFieldInfo.py
rename to src/dabmodel/lam_field/lam_field_info.py
index 68831d6..a1888b8 100644
--- a/src/dabmodel/LAMFields/LAMFieldInfo.py
+++ b/src/dabmodel/lam_field/lam_field_info.py
@@ -1,24 +1,25 @@
 from typing import Optional, Any
-from .Constraint import Constraint
+from .constraint import Constraint
 
 
 class LAMFieldInfo:
     """This Class allows to describe a Field in Appliance class"""
 
-    def __init__(
-        self, *, doc: str = "", constraints: Optional[list[Constraint]] = None
-    ):
-        self._doc: str = doc
+    def __init__(self, *, doc: str = "", constraints: Optional[list[Constraint]] = None):
+        self.__doc: str = doc
         self.__constraints: list[Constraint]
         if constraints is None:
             self.__constraints = []
         else:
             self.__constraints = constraints
 
+    def add_constraint(self, constraint: Constraint):
+        self.__constraints.append(constraint)
+
     @property
     def doc(self) -> str:
         """Returns Field's documentation"""
-        return self._doc
+        return self.__doc
 
     @property
     def constraints(self) -> list[Constraint[Any]]:
diff --git a/src/dabmodel/meta/element.py b/src/dabmodel/meta/element.py
index ffe020e..9125791 100644
--- a/src/dabmodel/meta/element.py
+++ b/src/dabmodel/meta/element.py
@@ -8,8 +8,8 @@ import inspect, ast, textwrap
 from typeguard import check_type, TypeCheckError, CollectionCheckStrategy
 from frozendict import frozendict
 from ..tools import _resolve_annotation, _peel_annotated
-from ..LAMFields.LAMField import LAMField
-from ..LAMFields.LAMFieldInfo import LAMFieldInfo
+from ..lam_field.lam_field import LAMField
+from ..lam_field.lam_field_info import LAMFieldInfo
 
 from ..defines import ALLOWED_HELPERS_MATH, ALLOWED_HELPERS_DEFAULT, ALLOWED_MODEL_FIELDS_TYPES
 from ..base_element import BaseElement