diff --git a/src/Umbraco.Core/Constants-Conventions.cs b/src/Umbraco.Core/Constants-Conventions.cs
index 5f5201a049..bdbd46e0cb 100644
--- a/src/Umbraco.Core/Constants-Conventions.cs
+++ b/src/Umbraco.Core/Constants-Conventions.cs
@@ -281,22 +281,6 @@ namespace Umbraco.Core
 			    public const string AllMembersListId = "all-members";
 			}
 
-			/// <summary>
-			/// Defines the alias identifiers for the built-in Umbraco relation types
-			/// </summary>
-			public static class Relations
-			{
-				/// <summary>
-				/// Relation type alias for relating a document on the copy event
-				/// </summary>
-				public const string RelateDocumentOnCopy = "relateDocumentOnCopy";
-
-				/// <summary>
-				/// Relation type alias for relating a document to its parent document on delete
-				/// </summary>
-				public const string RelateParentDocumentOnDelete = "relateParentDocumentOnDelete";
-			}
-
 			/// <summary>
 			/// Constants for Umbraco URLs/Querystrings.
 			/// </summary>
@@ -309,7 +293,7 @@ namespace Umbraco.Core
 			}
             
             /// <summary>
-            /// Defines the alias identifiers for Umbraco relation types.
+            /// Defines the alias identifiers for built-in Umbraco relation types.
             /// </summary>
             public static class RelationTypes
             {
@@ -322,6 +306,16 @@ namespace Umbraco.Core
                 /// ContentType alias for default relation type "Relate Document On Copy".
                 /// </summary>
                 public const string RelateDocumentOnCopyAlias = "relateDocumentOnCopy";
+
+                /// <summary>
+                /// ContentType name for default relation type "Relate Parent Document On Delete".
+                /// </summary>
+                public const string RelateParentDocumentOnDeleteName = "Relate Parent Document On Delete";
+
+                /// <summary>
+                /// ContentType alias for default relation type "Relate Parent Document On Delete".
+                /// </summary>
+                public const string RelateParentDocumentOnDeleteAlias = "relateParentDocumentOnDelete";
             }
 		}
 	}
diff --git a/src/Umbraco.Core/Models/Rdbms/RelationTypeDto.cs b/src/Umbraco.Core/Models/Rdbms/RelationTypeDto.cs
index 62a27e9506..5748fb7eff 100644
--- a/src/Umbraco.Core/Models/Rdbms/RelationTypeDto.cs
+++ b/src/Umbraco.Core/Models/Rdbms/RelationTypeDto.cs
@@ -10,7 +10,7 @@ namespace Umbraco.Core.Models.Rdbms
     internal class RelationTypeDto
     {
         [Column("id")]
-        [PrimaryKeyColumn(IdentitySeed = 2)]
+        [PrimaryKeyColumn(IdentitySeed = 3)]
         public int Id { get; set; }
 
         [Column("dual")]
diff --git a/src/Umbraco.Core/Persistence/Migrations/Initial/BaseDataCreation.cs b/src/Umbraco.Core/Persistence/Migrations/Initial/BaseDataCreation.cs
index 0b2e360467..cb9408b218 100644
--- a/src/Umbraco.Core/Persistence/Migrations/Initial/BaseDataCreation.cs
+++ b/src/Umbraco.Core/Persistence/Migrations/Initial/BaseDataCreation.cs
@@ -268,7 +268,8 @@ namespace Umbraco.Core.Persistence.Migrations.Initial
 
         private void CreateUmbracoRelationTypeData()
         {
-            _database.Insert("umbracoRelationType", "id", false, new RelationTypeDto { Id = 1, Alias = Constants.Conventions.Relations.RelateDocumentOnCopy, ChildObjectType = new Guid(Constants.ObjectTypes.Document), ParentObjectType = new Guid(Constants.ObjectTypes.Document), Dual = true, Name = "Relate Document On Copy" });
+            _database.Insert("umbracoRelationType", "id", false, new RelationTypeDto { Id = 1, Alias = Constants.Conventions.RelationTypes.RelateDocumentOnCopyAlias, ChildObjectType = new Guid(Constants.ObjectTypes.Document), ParentObjectType = new Guid(Constants.ObjectTypes.Document), Dual = true, Name = Constants.Conventions.RelationTypes.RelateDocumentOnCopyName });
+            _database.Insert("umbracoRelationType", "id", false, new RelationTypeDto { Id = 2, Alias = Constants.Conventions.RelationTypes.RelateParentDocumentOnDeleteAlias, ChildObjectType = new Guid(Constants.ObjectTypes.Document), ParentObjectType = new Guid(Constants.ObjectTypes.Document), Dual = false, Name = Constants.Conventions.RelationTypes.RelateParentDocumentOnDeleteName });
         }
 
         private void CreateCmsTaskTypeData()
diff --git a/src/Umbraco.Core/Persistence/Migrations/Upgrades/TargetVersionSevenThreeZero/AddRelationTypeForDocumentOnDelete.cs b/src/Umbraco.Core/Persistence/Migrations/Upgrades/TargetVersionSevenThreeZero/AddRelationTypeForDocumentOnDelete.cs
index 9268ff4af3..e46085897b 100644
--- a/src/Umbraco.Core/Persistence/Migrations/Upgrades/TargetVersionSevenThreeZero/AddRelationTypeForDocumentOnDelete.cs
+++ b/src/Umbraco.Core/Persistence/Migrations/Upgrades/TargetVersionSevenThreeZero/AddRelationTypeForDocumentOnDelete.cs
@@ -14,7 +14,7 @@ namespace Umbraco.Core.Persistence.Migrations.Upgrades.TargetVersionSevenThreeZe
 
         public static string AddRelationType(Database database)
         {
-            database.Insert("umbracoRelationType", "id", false, new RelationTypeDto { Id = 2, Alias = Constants.Conventions.Relations.RelateParentDocumentOnDelete, ChildObjectType = new Guid(Constants.ObjectTypes.Document), ParentObjectType = new Guid(Constants.ObjectTypes.Document), Dual = false, Name = "Relate Parent Document On Delete" });
+            database.Insert("umbracoRelationType", "id", false, new RelationTypeDto { Alias = Constants.Conventions.RelationTypes.RelateParentDocumentOnDeleteAlias, ChildObjectType = new Guid(Constants.ObjectTypes.Document), ParentObjectType = new Guid(Constants.ObjectTypes.Document), Dual = false, Name = Constants.Conventions.RelationTypes.RelateParentDocumentOnDeleteName });
 
             return string.Empty;
         }