Single Word : Cannot be resolved by waiting and trying again

I'm looking for a single word that means an issue cannot be resolved by waiting and trying again. Essentially the opposite of intermittent or temporary.

I would previously have used systemic or systematic, but checking the dictionary definitions of these having been challenged on them neither seems to quite fit.

Update to answer questions in the comments:

The word I'm looking for should reflect a problem that will persist until external action is taken, but is not necessarily urgent.

To use it in a sentence:

"Your request has encountered a {Special Word} problem, and will not be retried."

The use I'll be putting it to is more in the nature of a column header though. On the one hand there are temporary problems that might go away if we try again shortly, on the other hand are these problems.

Solution 1:

"Your request has encountered an unrecoverable problem, and will not be retried."

ODO:

unrecoverable ADJECTIVE
Not able to be recovered or corrected.

‘any sudden power failure can cause unrecoverable file and disc errors’

Techopedia:

Unrecoverable Error

An unrecoverable error is an error that occurs during the execution of a code or a program that has not been registered before and no retries can correct or undo the error.

Solution 2:

You should reword this wording altogether; none of the options here state unambiguously what you mean, and it is unlikely that any user reading this message with any of those examples will understand what you mean. Something like

Your request has encountered a problem this program cannot resolve, and it will not be retried.

This is far clearer than any single-word option available to slot into the sample sentence. Better still would be to suggest steps the user can take to remedy the situation, the more specific the better (but they have to be relevant—I can’t tell you how annoying it is for my personal Windows computer to tell me to talk to my network administrator).