If you use a PDF DRM system to protect books, courses, training materials, or paid documents, you may run into this problem: You delete an old PDF, upload a new version, and your existing users can no longer see the
How to Resolve "Maximum Allowed Devices" Errors in VeryPDF DRM Protector
If you are using VeryPDF DRM Protector to secure your PDF files and have enabled “Allow PDF to Be Opened Only on the First N Devices”, you may occasionally encounter an error stating that the PDF has reached the maximum