diff --git a/db/migrate/20210121134435_add_unique_index_to_experts_procedures.rb b/db/migrate/20210121134435_add_unique_index_to_experts_procedures.rb
new file mode 100644
index 000000000..965b5ba27
--- /dev/null
+++ b/db/migrate/20210121134435_add_unique_index_to_experts_procedures.rb
@@ -0,0 +1,5 @@
+class AddUniqueIndexToExpertsProcedures < ActiveRecord::Migration[6.0]
+  def change
+    add_index :experts_procedures, [:expert_id, :procedure_id], unique: true
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 64ad0784a..46a02c5a3 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2021_01_20_084256) do
+ActiveRecord::Schema.define(version: 2021_01_21_134435) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -334,6 +334,7 @@ ActiveRecord::Schema.define(version: 2021_01_20_084256) do
     t.boolean "allow_decision_access", default: false, null: false
     t.datetime "created_at", precision: 6, null: false
     t.datetime "updated_at", precision: 6, null: false
+    t.index ["expert_id", "procedure_id"], name: "index_experts_procedures_on_expert_id_and_procedure_id", unique: true
     t.index ["expert_id"], name: "index_experts_procedures_on_expert_id"
     t.index ["procedure_id"], name: "index_experts_procedures_on_procedure_id"
   end