diff --git a/src/nomad_simulations/schema_packages/physical_property.py b/src/nomad_simulations/schema_packages/physical_property.py
index 5bb728bc..28553c54 100644
--- a/src/nomad_simulations/schema_packages/physical_property.py
+++ b/src/nomad_simulations/schema_packages/physical_property.py
@@ -202,7 +202,7 @@ def variables_shape(self) -> Optional[list]:
         return []
 
     @property
-    def full_shape(self) -> list:
+    def full_shape(self) -> list:  # TODO: add support for N-dim variables
         """
         Full shape of the physical property. This quantity is calculated as a concatenation of the `variables_shape`
         and `rank`:
@@ -252,13 +252,6 @@ def __init__(
                 'The used property is not defined in the FAIRmat taxonomy (https://fairmat-nfdi.github.io/fairmat-taxonomy/). You can contribute there if you want to extend the list of available materials properties.'
             )
 
-        # Checking if the quantities `n_` are defined, as this are used to calculate `rank`
-        for quantity, _ in self.m_def.all_quantities.items():
-            if quantity.startswith('n_') and getattr(self, quantity) is None:
-                raise ValueError(
-                    f'`{quantity}` is not defined during initialization of the class.'
-                )
-
     def __setattr__(self, name: str, val: Any) -> None:
         # For the special case of `value`, its `shape` needs to be defined from `_full_shape`
         if name == 'value':