diff --git a/app/apps/import_app/services/v1.py b/app/apps/import_app/services/v1.py
index e19886b..a992630 100644
--- a/app/apps/import_app/services/v1.py
+++ b/app/apps/import_app/services/v1.py
@@ -406,15 +406,15 @@ class ImportService:
             if value is None:
                 value = mapping.default
 
-            if mapping.required and value is None and not mapping.transformations:
-                raise ValueError(f"Required field {field} is missing")
-
             # Apply transformations
             if mapping.transformations:
                 value = self._transform_value(value, mapping, row)
 
             value = self._coerce_type(value, mapping)
 
+            if mapping.required and value is None:
+                raise ValueError(f"Required field {field} is missing")
+
             if value is not None:
                 # Remove the prefix from the target field
                 target = mapping.target