Add cascading to UserGroup2LanguageDto.cs

src/Umbraco.Infrastructure/Migrations/Install/DatabaseSchemaCreator.cs

@@ -82,8 +82,8 @@ public class DatabaseSchemaCreator
         typeof(LogViewerQueryDto),
         typeof(ContentVersionCleanupPolicyDto),
         typeof(UserGroup2NodeDto),
-            typeof(CreatedPackageSchemaDto),
-            typeof(UserGroup2LanguageDto)
+        typeof(CreatedPackageSchemaDto),
+        typeof(UserGroup2LanguageDto)
     };
 
     private readonly IUmbracoDatabase _database;

src/Umbraco.Infrastructure/Persistence/Dtos/UserGroup2LanguageDto.cs

@@ -1,4 +1,5 @@
-using NPoco;
+using System.Data;
+using NPoco;
 using Umbraco.Cms.Infrastructure.Persistence.DatabaseAnnotations;
 
 namespace Umbraco.Cms.Infrastructure.Persistence.Dtos;
@@ -11,10 +12,10 @@ public class UserGroup2LanguageDto
 
     [Column("userGroupId")]
     [PrimaryKeyColumn(AutoIncrement = false, Name = "PK_userGroup2language", OnColumns = "userGroupId, languageId")]
-    [ForeignKey(typeof(UserGroupDto))]
+    [ForeignKey(typeof(UserGroupDto), OnDelete = Rule.Cascade)]
     public int UserGroupId { get; set; }
 
     [Column("languageId")]
-    [ForeignKey(typeof(LanguageDto))]
+    [ForeignKey(typeof(LanguageDto), OnDelete = Rule.Cascade)]
     public int LanguageId { get; set; }
 }