diff --git a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/Organizations/OrganizationUnit.cs b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/Organizations/OrganizationUnit.cs
index 83ada55fb9..e3925c5748 100644
--- a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/Organizations/OrganizationUnit.cs
+++ b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/Organizations/OrganizationUnit.cs
@@ -32,12 +32,7 @@ namespace Volo.Abp.Identity.Organizations
         /// Display name of this role.
         /// </summary>
         public virtual string DisplayName { get; set; }
-
-        /// <summary>
-        /// Children of this OU.
-        /// </summary>
-        public virtual ICollection<OrganizationUnit> Children { get; set; }
-
+        
         /// <summary>
         /// Roles of this OU.
         /// </summary>
diff --git a/modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/IdentityDbContextModelBuilderExtensions.cs b/modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/IdentityDbContextModelBuilderExtensions.cs
index b2b9d185ce..6e6d02d324 100644
--- a/modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/IdentityDbContextModelBuilderExtensions.cs
+++ b/modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo/Abp/Identity/EntityFrameworkCore/IdentityDbContextModelBuilderExtensions.cs
@@ -158,7 +158,7 @@ namespace Volo.Abp.Identity.EntityFrameworkCore
                 b.Property(ou => ou.Code).IsRequired().HasMaxLength(OrganizationUnitConsts.MaxCodeLength).HasColumnName(nameof(OrganizationUnit.Code));
                 b.Property(ou => ou.DisplayName).IsRequired().HasMaxLength(OrganizationUnitConsts.MaxDisplayNameLength).HasColumnName(nameof(OrganizationUnit.DisplayName));
 
-                b.HasMany(ou => ou.Children).WithOne().HasForeignKey(ou => ou.ParentId);
+                b.HasMany<OrganizationUnit>().WithOne().HasForeignKey(ou => ou.ParentId);
                 b.HasMany(ou => ou.Roles).WithOne().HasForeignKey(our => our.OrganizationUnitId).IsRequired();
 
                 b.HasIndex(ou => ou.Code);