Error when downloading pdf.

All pdf downloads are working fine but for 2 pdfs it is showing error(contact your admin)  and after checking logs this is the error: com.mendix.systemwideinterfaces.MendixRuntimeException: java.lang.IllegalStateException: PDF contains an encryption dictionary, please remove it with setAllSecurityToBeRemoved() or set a protection policy with protect.   Can anybody suggest something what can be done to resolve this issue.   Thanks in advance
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