diff --git a/app/services/naming_service.rb b/app/services/naming_service.rb
index 58f43ae8a..8e2ec2a4c 100644
--- a/app/services/naming_service.rb
+++ b/app/services/naming_service.rb
@@ -28,7 +28,7 @@ def self.name_file(original_filename:, pathname:)
   def self.name_project(name)
     return name unless Project.exists?(name: name)
 
-    projects = Project.where("name LIKE ?", "#{name}_copy-%")
+    projects = Project.where("name REGEXP ?", "^#{name}_copy-[0-9]+$")
     project_names = projects.map(&:name)
 
     new_name(