diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index 32e8b6c9..99028a51 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -8,7 +8,7 @@ def show
     authorize @course
 
     # query for all projects_instances, owner_type and owner_id for participants table
-    @course.projects.includes(project_instances: { enrolment: :user }).load
+    @course.projects.includes(project_instances: { supervisor_enrolment: :user }).load
     @projects_by_owner = @course.projects.index_by { |p| [p.owner_type, p.owner_id] }
 
     @student_list = @course.students
@@ -43,10 +43,10 @@ def show
     if @current_user_enrolment&.coordinator?
       supervisor_enrolment = @lecturer_enrolment || @current_user_enrolment
       @my_student_projects = @course.projects.supervised_by(supervisor_enrolment).approved
-      @incoming_proposals = @course.projects.where(enrolment: supervisor_enrolment).proposals
+      @incoming_proposals = @course.projects.where(supervisor_enrolment: supervisor_enrolment).proposals
     elsif @current_user_enrolment&.lecturer?
       @my_student_projects = @course.projects.supervised_by(@current_user_enrolment).approved
-      @incoming_proposals = @course.projects.where(enrolment: @current_user_enrolment).proposals
+      @incoming_proposals = @course.projects.where(supervisor_enrolment: @current_user_enrolment).proposals
     end
 
     # view instances for participants_table
@@ -262,7 +262,7 @@ def profile
     @course = Course.find(params[:id])
     @grouped = @course.grouped
 
-    @course.projects.includes(project_instances: { enrolment: :user }).load
+    @course.projects.includes(project_instances: { supervisor_enrolment: :user }).load
     @projects_by_owner = @course.projects.index_by { |p| [p.owner_type, p.owner_id] }
 
     if @participant_type == 'group'
diff --git a/app/controllers/projects_controller.rb b/app/controllers/projects_controller.rb
index fa30d859..2bcdf4e8 100644
--- a/app/controllers/projects_controller.rb
+++ b/app/controllers/projects_controller.rb
@@ -163,7 +163,7 @@ def create
         @project = Project.create!(
           course: @course,
           owner: @course.grouped? ? group : current_user,
-          enrolment: supervisor_enrolment
+          supervisor_enrolment: supervisor_enrolment
         )
 
         # Get title
@@ -176,7 +176,7 @@ def create
           version: 1,
           title: title_value,
           created_by: current_user,
-          enrolment: supervisor_enrolment,
+          supervisor_enrolment: supervisor_enrolment,
           source_topic: topic || nil,
           last_edit_time: Time.current,
           last_edit_by: current_user.id
diff --git a/app/models/project.rb b/app/models/project.rb
index b415b42f..37ee0a81 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -2,7 +2,7 @@ class Project < ApplicationRecord
   enum :ownership_type, { student: 0, project_group: 1, lecturer: 2 }
   default_scope { where(ownership_type: %i[student project_group]) }
 
-  belongs_to :enrolment
+  belongs_to :supervisor_enrolment, class_name: 'Enrolment', foreign_key: 'enrolment_id'
   belongs_to :course
   belongs_to :owner, polymorphic: true
 
@@ -23,7 +23,7 @@ class Project < ApplicationRecord
   scope :proposals, -> { where(status: %i[pending redo rejected]) }
 
   # Enrolment (supervisor) filters
-  scope :supervised_by, ->(enrolment) { where(enrolment: enrolment) }
+  scope :supervised_by, ->(supervisor_enrolment) { where(supervisor_enrolment: supervisor_enrolment) }
 
   scope :owned_by_user_or_groups, lambda { |user, groups|
     where(owner: [user] + groups.to_a)
@@ -36,10 +36,7 @@ class Project < ApplicationRecord
   STATUS_SORT_ORDER = { 'rejected' => 0, 'redo' => 1, 'pending' => 2, 'not_submitted' => 3, 'approved' => 4 }.freeze
 
   def supervisor
-    return nil unless enrolment_id.present?
-
-    enrolment = Enrolment.find_by(id: enrolment_id)
-    enrolment&.user
+    self.supervisor_enrolment.user
   end
 
   def member
@@ -75,7 +72,7 @@ def instance_to_edit(created_by:, has_supervisor_comment:)
       project_instances.build(
         version: (project_instances.maximum(:version) || 0) + 1,
         created_by: created_by,
-        enrolment: enrolment,
+        supervisor_enrolment: supervisor_enrolment,
         title: current_title,
         status: (status if approved?)
       )
diff --git a/app/models/project_instance.rb b/app/models/project_instance.rb
index bdf749a6..c5671591 100644
--- a/app/models/project_instance.rb
+++ b/app/models/project_instance.rb
@@ -4,7 +4,7 @@ class ProjectInstance < ApplicationRecord
   default_scope { where(project_instance_type: :project) }
 
   belongs_to :project
-  belongs_to :enrolment
+  belongs_to :supervisor_enrolment, class_name: 'Enrolment', foreign_key: 'enrolment_id'
 
   has_many :comments, as: :location, dependent: :destroy
 
@@ -23,7 +23,7 @@ class ProjectInstance < ApplicationRecord
   validates :title, presence: true
 
   def supervisor
-    enrolment&.user
+    self.supervisor_enrolment.user
   end
 
   private
@@ -33,7 +33,7 @@ def update_parent_project
 
     project.update(
       status: status,
-      enrolment: enrolment
+      supervisor_enrolment: supervisor_enrolment
     )
   end
 
diff --git a/db/seeds.rb b/db/seeds.rb
index e4d8d0e6..7050342a 100644
--- a/db/seeds.rb
+++ b/db/seeds.rb
@@ -604,56 +604,56 @@
 
 group_1_project = Project.create!(
   course: course_with_groups,
-  enrolment: lecturer_1_lecturer_enrolment,
+  supervisor_enrolment: lecturer_1_lecturer_enrolment,
   owner: group_1,
   ownership_type: :project_group
 )
 
 group_2_project = Project.create!(
   course: course_with_groups,
-  enrolment: lecturer_1_lecturer_enrolment,
+  supervisor_enrolment: lecturer_1_lecturer_enrolment,
   owner: group_2,
   ownership_type: :project_group
 )
 
 group_3_project = Project.create!(
   course: course_with_groups,
-  enrolment: lecturer_1_lecturer_enrolment,
+  supervisor_enrolment: lecturer_1_lecturer_enrolment,
   owner: group_3,
   ownership_type: :project_group
 )
 
 group_4_project = Project.create!(
   course: course_with_groups,
-  enrolment: lecturer_1_lecturer_enrolment,
+  supervisor_enrolment: lecturer_1_lecturer_enrolment,
   owner: group_4,
   ownership_type: :project_group
 )
 
 student_1_project = Project.create!(
   course: course_no_groups,
-  enrolment: lecturer_1_lecturer_enrolment_no_groups,
+  supervisor_enrolment: lecturer_1_lecturer_enrolment_no_groups,
   owner: student1,
   ownership_type: :student
 )
 
 student_2_project = Project.create!(
   course: course_no_groups,
-  enrolment: lecturer_1_lecturer_enrolment_no_groups,
+  supervisor_enrolment: lecturer_1_lecturer_enrolment_no_groups,
   owner: student2,
   ownership_type: :student
 )
 
 student_3_project = Project.create!(
   course: course_no_groups,
-  enrolment: lecturer_1_lecturer_enrolment_no_groups,
+  supervisor_enrolment: lecturer_1_lecturer_enrolment_no_groups,
   owner: student3,
   ownership_type: :student
 )
 
 student_4_project = Project.create!(
   course: course_no_groups,
-  enrolment: lecturer_1_lecturer_enrolment_no_groups,
+  supervisor_enrolment: lecturer_1_lecturer_enrolment_no_groups,
   owner: student4,
   ownership_type: :student
 )
@@ -809,7 +809,7 @@
   created_by: student1,
   title: 'Difficult Group Project 1',
   status: :pending,
-  enrolment: lecturer_2_lecturer_enrolment
+  supervisor_enrolment: lecturer_2_lecturer_enrolment
 )
 
 group_1_instance_2 = ProjectInstance.create!(
@@ -818,7 +818,7 @@
   created_by: student1,
   title: 'Difficult Group Project 2',
   status: :redo,
-  enrolment: lecturer_2_lecturer_enrolment
+  supervisor_enrolment: lecturer_2_lecturer_enrolment
 )
 
 group_1_instance_3 = ProjectInstance.create!(
@@ -827,7 +827,7 @@
   created_by: student1,
   title: 'Difficult Group Project 3',
   status: :rejected,
-  enrolment: lecturer_3_lecturer_enrolment
+  supervisor_enrolment: lecturer_3_lecturer_enrolment
 )
 
 group_1_instance_4 = ProjectInstance.create!(
@@ -836,7 +836,7 @@
   created_by: student1,
   title: 'Difficult Group Project 4',
   status: :approved,
-  enrolment: lecturer_1_lecturer_enrolment
+  supervisor_enrolment: lecturer_1_lecturer_enrolment
 )
 
 group_2_instance_1 = ProjectInstance.create!(
@@ -845,7 +845,7 @@
   created_by: student4,
   title: 'Difficult Group Project Group 2',
   status: :rejected,
-  enrolment: lecturer_1_lecturer_enrolment
+  supervisor_enrolment: lecturer_1_lecturer_enrolment
 )
 
 group_3_instance_1 = ProjectInstance.create!(
@@ -854,7 +854,7 @@
   created_by: student7,
   title: 'Difficult Group Project Group 3',
   status: :redo,
-  enrolment: lecturer_1_lecturer_enrolment
+  supervisor_enrolment: lecturer_1_lecturer_enrolment
 )
 
 group_4_instance_1 = ProjectInstance.create!(
@@ -863,7 +863,7 @@
   created_by: student10,
   title: 'Difficult Group Project Group 4',
   status: :pending,
-  enrolment: lecturer_1_lecturer_enrolment
+  supervisor_enrolment: lecturer_1_lecturer_enrolment
 )
 
 student_1_project_instance_1 = ProjectInstance.create!(
@@ -872,7 +872,7 @@
   created_by: student1,
   title: 'Student 1 Project',
   status: :pending,
-  enrolment: lecturer_3_lecturer_enrolment_no_groups
+  supervisor_enrolment: lecturer_3_lecturer_enrolment_no_groups
 )
 
 student_1_project_instance_2 = ProjectInstance.create!(
@@ -881,7 +881,7 @@
   created_by: student1,
   title: 'Student 1 Project 2',
   status: :rejected,
-  enrolment: lecturer_3_lecturer_enrolment_no_groups
+  supervisor_enrolment: lecturer_3_lecturer_enrolment_no_groups
 )
 
 student_1_project_instance_3 = ProjectInstance.create!(
@@ -890,7 +890,7 @@
   created_by: student1,
   title: 'Student 1 Project 3',
   status: :redo,
-  enrolment: lecturer_2_lecturer_enrolment_no_groups
+  supervisor_enrolment: lecturer_2_lecturer_enrolment_no_groups
 )
 
 student_1_project_instance_4 = ProjectInstance.create!(
@@ -899,7 +899,7 @@
   created_by: student1,
   title: 'Student 1 Project 4',
   status: :approved,
-  enrolment: lecturer_1_lecturer_enrolment_no_groups
+  supervisor_enrolment: lecturer_1_lecturer_enrolment_no_groups
 )
 
 student_2_project_instance_1 = ProjectInstance.create!(
@@ -908,7 +908,7 @@
   created_by: student2,
   title: 'Student 2 Project',
   status: :pending,
-  enrolment: lecturer_1_lecturer_enrolment_no_groups
+  supervisor_enrolment: lecturer_1_lecturer_enrolment_no_groups
 )
 
 student_3_project_instance_1 = ProjectInstance.create!(
@@ -917,7 +917,7 @@
   created_by: student3,
   title: 'Student 3 Project',
   status: :redo,
-  enrolment: lecturer_1_lecturer_enrolment_no_groups
+  supervisor_enrolment: lecturer_1_lecturer_enrolment_no_groups
 )
 
 student_4_project_instance_1 = ProjectInstance.create!(
@@ -926,7 +926,7 @@
   created_by: student4,
   title: 'Student 4 Project',
   status: :rejected,
-  enrolment: lecturer_1_lecturer_enrolment_no_groups
+  supervisor_enrolment: lecturer_1_lecturer_enrolment_no_groups
 )
 
 # Create Project Instance Fields
diff --git a/test/factories/project_instances.rb b/test/factories/project_instances.rb
index 6d00c3e2..9f605bea 100644
--- a/test/factories/project_instances.rb
+++ b/test/factories/project_instances.rb
@@ -1,7 +1,7 @@
 FactoryBot.define do
   factory :project_instance do
     association :project
-    association :enrolment
+    association :supervisor_enrolment, factory: :enrolment
     association :created_by, factory: :user
     version { 1 }
     status { :pending }
diff --git a/test/factories/projects.rb b/test/factories/projects.rb
index 1b5eddc4..170f0db7 100644
--- a/test/factories/projects.rb
+++ b/test/factories/projects.rb
@@ -1,7 +1,7 @@
 FactoryBot.define do
   factory :project do
     association :course
-    association :enrolment
+    association :supervisor_enrolment, factory: :enrolment
     owner { association :user }
     owner_type { 'User' }
     status { :pending }
diff --git a/test/models/project_instance_test.rb b/test/models/project_instance_test.rb
index 4b9136eb..f101cbc4 100644
--- a/test/models/project_instance_test.rb
+++ b/test/models/project_instance_test.rb
@@ -5,13 +5,13 @@ class ProjectInstanceTest < ActiveSupport::TestCase
     @course    = FactoryBot.create(:course)
     @user      = FactoryBot.create(:user, is_staff: false)
     @enrolment = FactoryBot.create(:enrolment, user: @user, course: @course, role: :student)
-    @project   = FactoryBot.create(:project, course: @course, owner: @user, enrolment: @enrolment)
+    @project   = FactoryBot.create(:project, course: @course, owner: @user, supervisor_enrolment: @enrolment)
   end
 
   test 'project instance created with happy paths' do
     instance = ProjectInstance.create!(
       project: @project,
-      enrolment: @enrolment,
+      supervisor_enrolment: @enrolment,
       created_by: @user,
       version: 1,
       title: 'Test Project Title'
@@ -25,7 +25,7 @@ class ProjectInstanceTest < ActiveSupport::TestCase
   test 'saving project instance updates the parent project status happy path' do
     ProjectInstance.create!(
       project: @project,
-      enrolment: @enrolment,
+      supervisor_enrolment: @enrolment,
       created_by: @user,
       version: 1,
       title: 'Test Project Title'
@@ -36,12 +36,12 @@ class ProjectInstanceTest < ActiveSupport::TestCase
 
   test 'saving an older instance does not overwrite parent project status sad path' do
     instance_v1 = ProjectInstance.create!(
-      project: @project, enrolment: @enrolment,
+      project: @project, supervisor_enrolment: @enrolment,
       created_by: @user, version: 1,
       title: 'Test Project Title', status: :pending
     )
     ProjectInstance.create!(
-      project: @project, enrolment: @enrolment,
+      project: @project, supervisor_enrolment: @enrolment,
       created_by: @user, version: 2,
       title: 'Test Project Title 2', status: :approved
     )
@@ -53,12 +53,12 @@ class ProjectInstanceTest < ActiveSupport::TestCase
 
   test 'current_instance returns the instance with the highest version' do
     ProjectInstance.create!(
-      project: @project, enrolment: @enrolment,
+      project: @project, supervisor_enrolment: @enrolment,
       created_by: @user, version: 1,
       title: 'Test Project Title'
     )
     instance_v2 = ProjectInstance.create!(
-      project: @project, enrolment: @enrolment,
+      project: @project, supervisor_enrolment: @enrolment,
       created_by: @user, version: 2,
       title: 'Test Project Title 2'
     )
@@ -82,13 +82,13 @@ class ProjectInstanceTest < ActiveSupport::TestCase
 
   test 'cannot create two instances with the same version for the same project' do
     ProjectInstance.create!(
-      project: @project, enrolment: @enrolment,
+      project: @project, supervisor_enrolment: @enrolment,
       created_by: @user, version: 1, title: 'First'
     )
 
     assert_raises ActiveRecord::RecordNotUnique do
       ProjectInstance.create!(
-        project: @project, enrolment: @enrolment,
+        project: @project, supervisor_enrolment: @enrolment,
         created_by: @user, version: 1, title: 'Duplicate'
       )
     end
diff --git a/test/models/project_test.rb b/test/models/project_test.rb
index 93899e5f..b5ee5872 100644
--- a/test/models/project_test.rb
+++ b/test/models/project_test.rb
@@ -7,8 +7,8 @@ class ProjectTest < ActiveSupport::TestCase
     @lecturer         = create(:user, is_staff: true)
     @student_enrolment  = create(:enrolment, :student, user: @student, course: @course)
     @lecturer_enrolment = create(:enrolment, :lecturer, user: @lecturer, course: @course)
-    @project          = create(:project, course: @course, owner: @student, enrolment: @lecturer_enrolment)
-    @instance         = create(:project_instance, project: @project, enrolment: @lecturer_enrolment, created_by: @student, version: 1)
+    @project          = create(:project, course: @course, owner: @student, supervisor_enrolment: @lecturer_enrolment)
+    @instance         = create(:project_instance, project: @project, supervisor_enrolment: @lecturer_enrolment, created_by: @student, version: 1)
   end
 
   test 'instance_to_edit returns new instance when project is rejected' do
diff --git a/test/system/projects/change_status_test.rb b/test/system/projects/change_status_test.rb
index b2023074..de27fdb2 100644
--- a/test/system/projects/change_status_test.rb
+++ b/test/system/projects/change_status_test.rb
@@ -11,8 +11,8 @@ class ChangeStatusTest < ApplicationSystemTestCase
     @lecturer_enrolment = create(:enrolment, user: @lecturer, course: @course, role: :lecturer)
     @other_student_enrolment = create(:enrolment, user: @other_student, course: @course, role: :student)
 
-    @project = create(:project, course: @course, owner: @student, enrolment: @lecturer_enrolment)
-    @instance = create(:project_instance, project: @project, enrolment: @lecturer_enrolment, created_by: @student, version: 1, status: :pending)
+    @project = create(:project, course: @course, owner: @student, supervisor_enrolment: @lecturer_enrolment)
+    @instance = create(:project_instance, project: @project, supervisor_enrolment: @lecturer_enrolment, created_by: @student, version: 1, status: :pending)
   end
 
   test 'supervisor can change project status happy path' do
diff --git a/test/system/projects/project_versioning_test.rb b/test/system/projects/project_versioning_test.rb
index ab824359..b7861ebc 100644
--- a/test/system/projects/project_versioning_test.rb
+++ b/test/system/projects/project_versioning_test.rb
@@ -9,9 +9,9 @@ class ProjectVersioningTest < ApplicationSystemTestCase
     @student_enrolment  = create(:enrolment, :student, user: @student, course: @course)
     @lecturer_enrolment = create(:enrolment, :lecturer, user: @lecturer, course: @course)
 
-    @project    = create(:project, course: @course, owner: @student, enrolment: @lecturer_enrolment)
-    @instance_1 = create(:project_instance, project: @project, enrolment: @lecturer_enrolment, created_by: @student, version: 1, status: :pending)
-    @instance_2 = create(:project_instance, project: @project, enrolment: @lecturer_enrolment, created_by: @student, version: 2, status: :pending)
+    @project    = create(:project, course: @course, owner: @student, supervisor_enrolment: @lecturer_enrolment)
+    @instance_1 = create(:project_instance, project: @project, supervisor_enrolment: @lecturer_enrolment, created_by: @student, version: 1, status: :pending)
+    @instance_2 = create(:project_instance, project: @project, supervisor_enrolment: @lecturer_enrolment, created_by: @student, version: 2, status: :pending)
   end
 
   test 'defaults to latest version on page load' do