diff --git a/README.md b/README.md
index d0cf1a5a1cebd8e8b56ff12dc812bd6afcea2480..b5d9f64bb08b5feb96b7717f1376fc6348e0d934 100644
--- a/README.md
+++ b/README.md
@@ -1,12 +1,12 @@
 REST API created using Django, Neo4j and Neomodel.
 
-### Clone the repository
+## Clone the repository
 ~~~
 git clone https://git.embl.de/yelmoubayed/new-dp-service.git    
 cd <repository>
 ~~~
 
-### Create a virtual environment to isolate the package dependencies locally
+## Create a virtual environment to isolate the package dependencies locally
 ~~~
 python3 -m venv env 
 ~~~
@@ -17,17 +17,17 @@ source env/bin/activate #On Linux and MacOS
 env\Scripts\activate #On Windows    
 ~~~
 
-### Install requirements
+## Install requirements
 ~~~
 pip install -r requirements.txt
 ~~~
 
-### To add new requirements if needed 
+## To add new requirements if needed 
 ~~~
 pip freeze > requirements.txt
 ~~~
 
-### Django common command lines
+## Django common command lines
 
 #### Create constraintes
 ~~~
diff --git a/dataproc/api/models/__pycache__/construct_model.cpython-38.pyc b/dataproc/api/models/__pycache__/construct_model.cpython-38.pyc
index 1a35d6ad81cae438470b4fb5ba44d84b17dbe47a..fd1129b42abca1dd1fcddc931d2e6694d81671c0 100644
Binary files a/dataproc/api/models/__pycache__/construct_model.cpython-38.pyc and b/dataproc/api/models/__pycache__/construct_model.cpython-38.pyc differ
diff --git a/dataproc/api/models/construct_model.py b/dataproc/api/models/construct_model.py
index ea5d60d74835a295f3ff0b215e0df4d0322ffa27..c8e9bed72998160ac67e7f1af81d7f953beda06a 100644
--- a/dataproc/api/models/construct_model.py
+++ b/dataproc/api/models/construct_model.py
@@ -1,4 +1,5 @@
 from neomodel import StructuredNode, StringProperty, IntegerProperty,UniqueIdProperty, RelationshipTo
+from uuid import uuid4
 
 # from api.models.ocf_model import OCF
 # from api.models.storagehost_model import StorageHost
@@ -7,7 +8,7 @@ from neomodel import StructuredNode, StringProperty, IntegerProperty,UniqueIdPro
 
 class Construct(StructuredNode):
 	
-	uid=UniqueIdProperty()
+	uid=UniqueIdProperty(default=uuid4)
 	name=StringProperty()
 	
 	# Relationships
diff --git a/dataproc/api/views/__pycache__/construct_view.cpython-38.pyc b/dataproc/api/views/__pycache__/construct_view.cpython-38.pyc
index b5b58a083bee054223f4dfd50b247248f99fde38..c24e15ba959a8420bb8150cc5e607ef7ab1007e1 100644
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