I'm also having the same problem. Disabled all apps in "Device admin apps" to no avail. Then uninstalled them but still the same.
Edit: fixed mine. Seems the clipboard is from the secure folder. Open the secure folder and try to delete it there.
I was confused by what you said at first but I got it and it worked! I needed to add the "Clipboard" panel to the Edge Screen and then delete the unwanted items from there. It worked perfectly, thank you for the suggestion
Unable to delete Clipboard protected by security policy
+I'm using a Samsung Galaxy S10
I have some items locked to my clipboard that I cannot unlock and delete.
When I try I receive an error message saying
"Security Policy prevents you from selecting this item"
what does it mean ??!! when i try to select item done by me ??!!!!
how can I delete clipboard text which I have written ?! How is this error when I try to delete and message is appearing , security policy prevents you from selecting this item, what is this and why ?!!! The problem is when copy text from dual app as what's upp dual messenger, this error is unknown and solution is still unidentified
Really this is very surprising and annoying, How is Samsung software unaware with such these errors?!!!
This is unacceptable and incomprehensible
I got it by your explanation about Edge panel but i can't delete the item separately unless clear all items except i have locked my self as it can be deleted on any of typing text apps.
but i don't understand the explanation of it and demonstration why is it happening especially to dual messenger, this is unacceptable and unidentified issue.
It's regret to inform that Samsung support doesn't know to solve such issues even the description to activate safe mode is not correct as this is misguiding the users - people.