diff --git a/samples/Samples.AbpSharding/AbstractShardingAbpDbContext.cs b/samples/Samples.AbpSharding/AbstractShardingAbpDbContext.cs
index 55f6c544..2b7db47b 100644
--- a/samples/Samples.AbpSharding/AbstractShardingAbpDbContext.cs
+++ b/samples/Samples.AbpSharding/AbstractShardingAbpDbContext.cs
@@ -50,7 +50,7 @@ namespace Samples.AbpSharding
                     if (dbContext is AbpDbContext<TDbContext> abpDbContext && abpDbContext.LazyServiceProvider == null)
                     {
                         abpDbContext.LazyServiceProvider = this.LazyServiceProvider;
-                        if (dbContext is IAbpEfCoreDbContext abpEfCoreDbContext)
+                        if (dbContext is IAbpEfCoreDbContext abpEfCoreDbContext&&this.UnitOfWorkManager.Current!=null)
                         {
                             abpEfCoreDbContext.Initialize(
                                 new AbpEfCoreDbContextInitializationContext(