diff --git a/app/models/project/life_cycle_step_definition.rb b/app/models/project/life_cycle_step_definition.rb
index c420e696dbd5..391bc1cd0733 100644
--- a/app/models/project/life_cycle_step_definition.rb
+++ b/app/models/project/life_cycle_step_definition.rb
@@ -37,7 +37,7 @@ class Project::LifeCycleStepDefinition < ApplicationRecord
   has_many :projects, through: :life_cycle_steps
   belongs_to :color, optional: false
 
-  validates :name, presence: true
+  validates :name, presence: true, uniqueness: true
   validates :type, inclusion: { in: %w[Project::StageDefinition Project::GateDefinition], message: :must_be_a_stage_or_gate }
 
   attr_readonly :type
diff --git a/db/migrate/20241217190533_add_uniqueness_index_to_project_life_cycle_step_definitions_name.rb b/db/migrate/20241217190533_add_uniqueness_index_to_project_life_cycle_step_definitions_name.rb
new file mode 100644
index 000000000000..f6aba362e529
--- /dev/null
+++ b/db/migrate/20241217190533_add_uniqueness_index_to_project_life_cycle_step_definitions_name.rb
@@ -0,0 +1,5 @@
+class AddUniquenessIndexToProjectLifeCycleStepDefinitionsName < ActiveRecord::Migration[7.1]
+  def change
+    add_index :project_life_cycle_step_definitions, :name, unique: true
+  end
+end