diff --git a/ippisite/ippidb/forms.py b/ippisite/ippidb/forms.py
index fc4df4cfc2358a924b63f0d9f2a35f3fb05287eb..e98f56819bf72f0f8feffd4daf6233fad2f4f9dd 100644
--- a/ippisite/ippidb/forms.py
+++ b/ippisite/ippidb/forms.py
@@ -424,10 +424,6 @@ class ComplexCompositionBaseFormSet(forms.BaseFormSet):
             if form.cleaned_data.get("DELETE", False):
                 continue
             complex_type_dict.add(form.cleaned_data.get("complex_type"))
-        if self.has_bound and self.has_partner and len(complex_type_dict) < 2:
-            self._non_form_errors.append(
-                _("You need at least one bound and one partner")
-            )
 
     def __init__(
         self,
diff --git a/ippisite/requirements-dev-rachel.txt b/ippisite/requirements-dev-rachel.txt
new file mode 100644
index 0000000000000000000000000000000000000000..159e4b22264770293156b7273c2ab060fd3b29f9
--- /dev/null
+++ b/ippisite/requirements-dev-rachel.txt
@@ -0,0 +1,18 @@
+-r requirements-rachel.txt
+# linting and formatting
+flake8
+black
+flake8-black
+# documentation generation
+sphinx
+sphinx_rtd_theme
+# coverage
+coverage
+# tests
+requests-cache
+parameterized
+# dependencies to generate graph models using django-extensions
+#pygraphviz
+#pydot
+pyparsing
+pyyaml>=5.1
\ No newline at end of file
diff --git a/ippisite/requirements-rachel.txt b/ippisite/requirements-rachel.txt
index dd38c1d9427d4e6e1107a4307363ed11e85dfae8..662749c052669318b881567ef97c49cda31caff5 100644
--- a/ippisite/requirements-rachel.txt
+++ b/ippisite/requirements-rachel.txt
@@ -6,18 +6,24 @@ django-extensions
 django-formtools
 django-debug-toolbar
 django-allauth
+django-celery-results==1.2.1
 # import scripts
 pandas==1.0.5
+openpyxl
+xlwt
 # web services
 bioservices
 bioblend
 bs4
+chembl_webresource_client
 # libraries to compute PCA
 sklearn
 scipy
 matplotlib==2.2.3 #Matplotlib 3.0+ does not support Python 2.x, 3.0, 3.1, 3.2, 3.3, or 3.4.
+seaborn
 # postgres driver
 #psycopg2
+psycopg2-binary
 git+https://gitlab.pasteur.fr/hmenager/django-diu.git#egg=django_diu
 # openbabel is not installed from pip for now
 # openbabel