diff --git a/Marco.Pms.Services/Controllers/DocumentController.cs b/Marco.Pms.Services/Controllers/DocumentController.cs
index f450c41..8bd52cd 100644
--- a/Marco.Pms.Services/Controllers/DocumentController.cs
+++ b/Marco.Pms.Services/Controllers/DocumentController.cs
@@ -705,13 +705,6 @@ namespace Marco.Pms.Services.Controllers
                     return NotFound(ApiResponse<object>.ErrorResponse($"{(entityType == EmployeeEntity ? "Employee" : "Project")} Not Found", "Entity not found in database", 404));
                 }
 
-                var isDocumentExist = await _context.DocumentAttachments.AnyAsync(da => da.DocumentId == model.DocumentId && da.TenantId == tenantId);
-                if (isDocumentExist)
-                {
-                    _logger.LogWarning("{DocumentId} is already existed in database", model.DocumentId ?? string.Empty);
-                    return StatusCode(409, ApiResponse<object>.ErrorResponse("Document already existed", "Document already existed in database", 409));
-                }
-
                 // Map DTO to DB entity
                 var attachment = _mapper.Map<DocumentAttachment>(model);
                 attachment.UploadedAt = DateTime.UtcNow;
@@ -1108,13 +1101,6 @@ namespace Marco.Pms.Services.Controllers
                     return NotFound(ApiResponse<object>.ErrorResponse($"{(entityType == EmployeeEntity ? "Employee" : "Project")} Not Found", "Entity not found in database", 404));
                 }
 
-                var isDocumentExist = await _context.DocumentAttachments.AnyAsync(da => da.Id != model.Id && da.DocumentId == model.DocumentId && da.TenantId == tenantId);
-                if (isDocumentExist)
-                {
-                    _logger.LogWarning("{DocumentId} is already existed in database", model.DocumentId ?? string.Empty);
-                    return StatusCode(409, ApiResponse<object>.ErrorResponse("Document already existed", "Document already existed in database", 409));
-                }
-
                 // Prepare for versioning
                 var oldVersionMapping = await _context.AttachmentVersionMappings
                     .FirstOrDefaultAsync(av => av.ChildAttachmentId == oldAttachment.Id && av.TenantId == tenantId);