diff --git a/app/models/data_type.rb b/app/models/data_type.rb
index d0b96a0d..4bd29e1e 100644
--- a/app/models/data_type.rb
+++ b/app/models/data_type.rb
@@ -17,6 +17,8 @@ class DataType < ApplicationRecord
   has_translation :display_messages, purpose: :display_message
   has_translation :aliases, purpose: :alias
 
+  validates :identifier, presence: true, length: { maximum: 200 },
+                         uniqueness: { case_sensitive: false, scope: :runtime_id }
   validates :type, presence: true, length: { maximum: 65_536 }
   validates :definition_source, length: { maximum: 50 }
 
diff --git a/db/migrate/20260802173300_increase_data_type_identifier_limit.rb b/db/migrate/20260802173300_increase_data_type_identifier_limit.rb
new file mode 100644
index 00000000..adc11771
--- /dev/null
+++ b/db/migrate/20260802173300_increase_data_type_identifier_limit.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class IncreaseDataTypeIdentifierLimit < Code0::ZeroTrack::Database::Migration[1.0]
+  def change
+    remove_check_constraint :data_types, 'char_length(identifier) <= 50', name: 'check_3a7198812e'
+
+    add_check_constraint :data_types, 'char_length(identifier) <= 200', name: 'check_3a7198812e'
+  end
+end
diff --git a/db/schema_migrations/20260802173300 b/db/schema_migrations/20260802173300
new file mode 100644
index 00000000..9107a781
--- /dev/null
+++ b/db/schema_migrations/20260802173300
@@ -0,0 +1 @@
+dae616c0f9d3387cc26c3f3bd158c371757a26df88a597baf79b9e24dfbd8298
\ No newline at end of file
diff --git a/db/structure.sql b/db/structure.sql
index 69a8f091..8192c80e 100644
--- a/db/structure.sql
+++ b/db/structure.sql
@@ -169,7 +169,7 @@ CREATE TABLE data_types (
     definition_source text,
     runtime_module_id bigint NOT NULL,
     CONSTRAINT check_01ca31b7b9 CHECK ((char_length(type) <= 65536)),
-    CONSTRAINT check_3a7198812e CHECK ((char_length(identifier) <= 50)),
+    CONSTRAINT check_3a7198812e CHECK ((char_length(identifier) <= 200)),
     CONSTRAINT check_a133157a46 CHECK ((char_length(definition_source) <= 50))
 );
 
diff --git a/spec/models/data_type_spec.rb b/spec/models/data_type_spec.rb
index 92570359..1d6f6aee 100644
--- a/spec/models/data_type_spec.rb
+++ b/spec/models/data_type_spec.rb
@@ -20,6 +20,9 @@
   end
 
   describe 'validations' do
+    it { is_expected.to validate_presence_of(:identifier) }
+    it { is_expected.to validate_length_of(:identifier).is_at_most(200) }
+    it { is_expected.to validate_uniqueness_of(:identifier).case_insensitive.scoped_to(:runtime_id) }
     it { is_expected.to validate_presence_of(:type) }
     it { is_expected.to validate_length_of(:type).is_at_most(65_536) }
     it { is_expected.to validate_length_of(:definition_source).is_at_most(50) }