diff --git a/app/apps/core/forms.py b/app/apps/core/forms.py
index 26a65f8c6cfb9ff3773c77ead6ceb5aec02c6952..fe2297165a55961d4cd1425e5b6f17615e6037e5 100644
--- a/app/apps/core/forms.py
+++ b/app/apps/core/forms.py
@@ -47,6 +47,7 @@ class DocumentForm(BootstrapFormMixin, forms.ModelForm):
             self.initial['valid_line_types'] = LineType.objects.filter(default=True)
 
         self.fields['project'].queryset = Project.objects.for_user(self.request.user)
+        self.fields['project'].empty_label = None
         if self.instance.pk and self.instance.owner != self.request.user:
             self.fields['project'].disabled = True
 
diff --git a/app/apps/core/migrations/0044_auto_20210427_0946.py b/app/apps/core/migrations/0044_auto_20210427_0946.py
deleted file mode 100644
index d68d7b4f7142fb5649ccc26392e1d1eef6506bc5..0000000000000000000000000000000000000000
--- a/app/apps/core/migrations/0044_auto_20210427_0946.py
+++ /dev/null
@@ -1,39 +0,0 @@
-# Generated by Django 2.2.20 on 2021-04-27 09:46
-
-from django.conf import settings
-from django.db import migrations, models
-import django.db.models.deletion
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('auth', '0011_update_proxy_permissions'),
-        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
-        ('core', '0043_auto_20210324_1016'),
-    ]
-
-    operations = [
-        migrations.AlterField(
-            model_name='document',
-            name='read_direction',
-            field=models.CharField(choices=[('ltr', 'Left to right'), ('rtl', 'Right to left')], default='ltr', help_text='The read direction describes the order of the elements in the document, in opposition with the text direction which describes the order of the words in a line and is set by the script.', max_length=3),
-        ),
-        migrations.CreateModel(
-            name='Project',
-            fields=[
-                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('name', models.CharField(max_length=512)),
-                ('created_at', models.DateTimeField(auto_now_add=True)),
-                ('updated_at', models.DateTimeField(auto_now=True)),
-                ('owner', models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, to=settings.AUTH_USER_MODEL)),
-                ('shared_with_groups', models.ManyToManyField(blank=True, related_name='shared_projects', to='auth.Group', verbose_name='Share with teams')),
-                ('shared_with_users', models.ManyToManyField(blank=True, related_name='shared_projects', to=settings.AUTH_USER_MODEL, verbose_name='Share with users')),
-            ],
-        ),
-        migrations.AddField(
-            model_name='document',
-            name='project',
-            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, to='core.Project'),
-        ),
-    ]
diff --git a/app/apps/core/migrations/0045_project_slug.py b/app/apps/core/migrations/0045_project_slug.py
deleted file mode 100644
index 817618e77d1b00a5dfcead4491f762d789faadf3..0000000000000000000000000000000000000000
--- a/app/apps/core/migrations/0045_project_slug.py
+++ /dev/null
@@ -1,20 +0,0 @@
-# Generated by Django 2.2.20 on 2021-04-27 10:22
-
-import datetime
-from django.db import migrations, models
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('core', '0044_auto_20210427_0946'),
-    ]
-
-    operations = [
-        migrations.AddField(
-            model_name='project',
-            name='slug',
-            field=models.SlugField(default=datetime.datetime(2021, 4, 27, 10, 22, 51, 880783)),
-            preserve_default=False,
-        ),
-    ]
diff --git a/app/apps/core/migrations/0046_data_share_doc_to_proj.py b/app/apps/core/migrations/0046_data_share_doc_to_proj.py
deleted file mode 100644
index 5007decefb9efcc6eb7b0ebcb04f618855399483..0000000000000000000000000000000000000000
--- a/app/apps/core/migrations/0046_data_share_doc_to_proj.py
+++ /dev/null
@@ -1,81 +0,0 @@
-# Generated by Django 2.2.20 on 2021-05-10 13:06
-import time
-
-from django.db import migrations
-from django.template.defaultfilters import slugify
-
-
-def make_slug(proj, Project):
-    # models in migrations don't have access to models methods ;(
-    slug = slugify(proj.name)
-    # check unicity
-    exists = Project.objects.filter(slug=slug).count()
-    if not exists:
-        proj.slug = slug
-    else:
-        proj.slug = slug[:40] + hex(int(time.time()))[2:]
-
-    proj.save()
-
-
-def forwards(apps, schema_editor):
-    User = apps.get_model('users', 'User')
-    Project = apps.get_model('core', 'Project')
-    Document = apps.get_model('core', 'Document')
-    # create user projects
-    for user in User.objects.all():
-        proj, created = Project.objects.get_or_create(name=user.username+"'s Project",
-                                                      owner=user)
-        if not proj.slug:
-            make_slug(proj, Project)
-        # move documents into projects
-        user.document_set.update(project=proj)
-        # move share from docs to created projects
-        for doc in user.document_set.all():
-            for share in doc.shared_with_users.all():
-                proj.shared_with_users.add(share)
-            for share in doc.shared_with_groups.all():
-                proj.shared_with_groups.add(share)
-
-        # shared to draft
-        user.document_set.filter(workflow_state=1).update(workflow_state=0)
-
-    # deal with documents without owner (shouldn't be any but let's be safe)
-    # move them to admin's
-    user = User.objects.filter(is_superuser=True).first()
-    proj, dummy = Project.objects.get_or_create(name=user.username+"'s Project",
-                                                owner=user)
-    if not proj.slug:
-        make_slug(proj, Project)
-    for doc in Document.objects.filter(owner=None):
-        doc.project = proj
-        doc.save()
-        # move share from docs to created projects
-        for doc in user.document_set.all():
-            for share in doc.shared_with_users.all():
-                proj.shared_with_users.add(share)
-            for share in doc.shared_with_groups.all():
-                proj.shared_with_groups.add(share)
-
-
-def backwards(apps, schema_editor):
-    Document = apps.get_model('core', 'Document')
-    for doc in Document.objects.all():
-        if doc.project:
-            for share in doc.project.shared_with_users.all():
-                doc.shared_with_users.add(share)
-            for share in doc.project.shared_with_groups.all():
-                doc.shared_with_groups.add(share)
-
-    Document.objects.update(project=None)
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('core', '0045_project_slug'),
-    ]
-
-    operations = [
-        migrations.RunPython(forwards, backwards),
-    ]
diff --git a/app/apps/core/migrations/0047_auto_20210510_1512.py b/app/apps/core/migrations/0047_auto_20210510_1512.py
deleted file mode 100644
index e0b7560b07481f384ba4f2565cbb48015ab1e706..0000000000000000000000000000000000000000
--- a/app/apps/core/migrations/0047_auto_20210510_1512.py
+++ /dev/null
@@ -1,36 +0,0 @@
-# Generated by Django 2.2.20 on 2021-05-10 15:12
-
-from django.db import migrations, models
-import django.db.models.deletion
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('core', '0046_data_share_doc_to_proj'),
-    ]
-
-    operations = [
-        migrations.AlterModelOptions(
-            name='project',
-            options={'ordering': ('-updated_at',)},
-        ),
-        migrations.RemoveField(
-            model_name='document',
-            name='shared_with_groups',
-        ),
-        migrations.RemoveField(
-            model_name='document',
-            name='shared_with_users',
-        ),
-        migrations.AlterField(
-            model_name='document',
-            name='project',
-            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='documents', to='core.Project'),
-        ),
-        migrations.AlterField(
-            model_name='document',
-            name='workflow_state',
-            field=models.PositiveSmallIntegerField(choices=[(0, 'Draft'), (2, 'Published'), (3, 'Archived')], default=0),
-        ),
-    ]
diff --git a/app/apps/core/migrations/0048_auto_20210520_1308.py b/app/apps/core/migrations/0048_auto_20210520_1308.py
deleted file mode 100644
index 31bfc70455cc2db516958f3134cf2ceb29e8f11c..0000000000000000000000000000000000000000
--- a/app/apps/core/migrations/0048_auto_20210520_1308.py
+++ /dev/null
@@ -1,19 +0,0 @@
-# Generated by Django 2.2.20 on 2021-05-20 13:08
-
-from django.db import migrations, models
-import django.db.models.deletion
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('core', '0047_auto_20210510_1512'),
-    ]
-
-    operations = [
-        migrations.AlterField(
-            model_name='document',
-            name='project',
-            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='documents', to='core.Project'),
-        ),
-    ]
diff --git a/app/apps/core/models.py b/app/apps/core/models.py
index a9fb102b2b42ee563a1b0402b2654604d38f8348..c51b2f073ed21ee367da032543af810469df22c9 100644
--- a/app/apps/core/models.py
+++ b/app/apps/core/models.py
@@ -149,7 +149,7 @@ class ProjectManager(models.Manager):
 
 class Project(models.Model):
     name = models.CharField(max_length=512)
-    slug = models.SlugField()
+    slug = models.SlugField(unique=True)
 
     created_at = models.DateTimeField(auto_now_add=True)
     updated_at = models.DateTimeField(auto_now=True)