diff --git a/src/PhenX.EntityFrameworkCore.BulkInsert/Metadata/ColumnMetadata.cs b/src/PhenX.EntityFrameworkCore.BulkInsert/Metadata/ColumnMetadata.cs
index 2ab9d11..71f04b0 100644
--- a/src/PhenX.EntityFrameworkCore.BulkInsert/Metadata/ColumnMetadata.cs
+++ b/src/PhenX.EntityFrameworkCore.BulkInsert/Metadata/ColumnMetadata.cs
@@ -21,7 +21,11 @@ public ColumnMetadata(IProperty property,  SqlDialectBuilder dialect, IComplexPr
         QuotedColumName = dialect.Quote(ColumnName);
         StoreDefinition = GetStoreDefinition(property);
         ClrType = property.ClrType;
-        IsGenerated = property.ValueGenerated != ValueGenerated.Never;
+        IsGenerated = property.ValueGenerated != ValueGenerated.Never
+                      && (property.GetDefaultValueSql() != null
+                          || property.GetComputedColumnSql() != null
+                          || property.FindAnnotation(RelationalAnnotationNames.DefaultValue) != null
+                          || (property.ClrType != typeof(Guid) && property.ClrType != typeof(Guid?)));
     }
 
     private readonly Func<object, object?> _getter;
diff --git a/tests/PhenX.EntityFrameworkCore.BulkInsert.Tests/DbContext/TestDbContext.cs b/tests/PhenX.EntityFrameworkCore.BulkInsert.Tests/DbContext/TestDbContext.cs
index 24ae154..a895781 100644
--- a/tests/PhenX.EntityFrameworkCore.BulkInsert.Tests/DbContext/TestDbContext.cs
+++ b/tests/PhenX.EntityFrameworkCore.BulkInsert.Tests/DbContext/TestDbContext.cs
@@ -30,12 +30,6 @@ protected override void OnModelCreating(ModelBuilder modelBuilder)
                 .HasConversion(new DateTimeToBinaryConverter());
         });
 
-        modelBuilder.Entity<TestEntityWithGuidId>(builder =>
-        {
-            builder.Property(e => e.Id)
-                .ValueGeneratedNever();
-        });
-
         modelBuilder.Entity<TestEntityWithComplexType>(builder =>
         {
             builder
diff --git a/tests/PhenX.EntityFrameworkCore.BulkInsert.Tests/Tests/Basic/BasicTestsBase.cs b/tests/PhenX.EntityFrameworkCore.BulkInsert.Tests/Tests/Basic/BasicTestsBase.cs
index c273ac0..bde7d79 100644
--- a/tests/PhenX.EntityFrameworkCore.BulkInsert.Tests/Tests/Basic/BasicTestsBase.cs
+++ b/tests/PhenX.EntityFrameworkCore.BulkInsert.Tests/Tests/Basic/BasicTestsBase.cs
@@ -314,15 +314,12 @@ public async Task InsertEntities_WithGeneratedGuidId(InsertStrategy strategy)
             new TestEntityWithGuidId { TestRun = _run, Id = Guid.NewGuid(), Name = $"{_run}_Entity2" }
         };
 
-        // Act
-        var insertedEntities = await _context.InsertWithStrategyAsync(strategy, entities, configure => configure.CopyGeneratedColumns = true);
+        // Act - Guid PKs should be included in INSERT without requiring CopyGeneratedColumns = true
+        var insertedEntities = await _context.InsertWithStrategyAsync(strategy, entities);
 
-        // Assert
+        // Assert - all fields including the application-assigned Guid Id should be preserved
         insertedEntities.Should().BeEquivalentTo(entities,
-            o=> o
-                .RespectingRuntimeTypes()
-                .Excluding(e => e.Id)
-            );
+            o => o.RespectingRuntimeTypes());
     }
 
     [SkippableTheory]
diff --git a/tests/PhenX.EntityFrameworkCore.BulkInsert.Tests/Tests/Merge/MergeTestsBase.cs b/tests/PhenX.EntityFrameworkCore.BulkInsert.Tests/Tests/Merge/MergeTestsBase.cs
index 69661c6..6489520 100644
--- a/tests/PhenX.EntityFrameworkCore.BulkInsert.Tests/Tests/Merge/MergeTestsBase.cs
+++ b/tests/PhenX.EntityFrameworkCore.BulkInsert.Tests/Tests/Merge/MergeTestsBase.cs
@@ -87,9 +87,9 @@ public async Task InsertEntities_MultipleTimes_WithGuidId(InsertStrategy strateg
                 Update = (inserted, excluded) => inserted,
             });
 
-        // Assert
+        // Assert - all fields including the application-assigned Guid Id should be preserved
         insertedEntities.Should().BeEquivalentTo(entities,
-            o => o.RespectingRuntimeTypes().Excluding(e => e.Id));
+            o => o.RespectingRuntimeTypes());
     }
 
     [SkippableTheory]