diff --git a/src/paveit/datamodels/material.py b/src/paveit/datamodels/material.py
index 0e32c51..d099017 100755
--- a/src/paveit/datamodels/material.py
+++ b/src/paveit/datamodels/material.py
@@ -36,6 +36,8 @@ class Material(Document):
     project_ids = ListField(LazyReferenceField(Project,
                                               reverse_delete_rule=CASCADE),
                                               required=False)
+    
+    archived = BooleanField(default=False)  
 
     def to_dict(self):
         # convert data to dict
@@ -53,7 +55,7 @@ class Material(Document):
         'collection': 'materials',
         "db_alias": 'dblabtests',
         'indexes': [
-            [("material", 1)],
+            [("material_id", 1)],
             [("name", 1)],
         ]
     }
diff --git a/src/paveit/datamodels/material_properties.py b/src/paveit/datamodels/material_properties.py
index ea6f4f1..61b875e 100755
--- a/src/paveit/datamodels/material_properties.py
+++ b/src/paveit/datamodels/material_properties.py
@@ -74,7 +74,7 @@ class Propertie(Document):
         'collection': 'materialproperties',
         "db_alias": 'dblabtests',
         'indexes': [
-            [("material", 1)],
+            [("material_id", 1)],
             [("name", 1)],
         ]
     }