diff --git a/framework/src/Volo.Abp.EntityFrameworkCore/Volo/Abp/EntityFrameworkCore/AbpDbContext.cs b/framework/src/Volo.Abp.EntityFrameworkCore/Volo/Abp/EntityFrameworkCore/AbpDbContext.cs
index 8d519784dc..1f55bce770 100644
--- a/framework/src/Volo.Abp.EntityFrameworkCore/Volo/Abp/EntityFrameworkCore/AbpDbContext.cs
+++ b/framework/src/Volo.Abp.EntityFrameworkCore/Volo/Abp/EntityFrameworkCore/AbpDbContext.cs
@@ -122,12 +122,6 @@ public abstract class AbpDbContext<TDbContext> : DbContext, IAbpEfCoreDbContext,
         if (provider != null)
         {
             modelBuilder.SetDatabaseProvider(provider.Value);
-
-            if (provider.Value == EfCoreDatabaseProvider.PostgreSql)
-            {
-                // https://www.npgsql.org/efcore/release-notes/6.0.html#opting-out-of-the-new-timestamp-mapping-logic
-                AppContext.SetSwitch("Npgsql.EnableLegacyTimestampBehavior", true);
-            }
         }
     }