Logical determinism

Have a good week and a happy new year,
In your book, The Science of Freedom, page 127, you write:
"The truth value of the claim was "true" all along, but until now we (and no one else) knew this. Now this has come to our attention. But at the same time this does not mean that a situation is not possible in which a naval battle does not occur, that is, that the battle was predetermined (as determinism holds). Such a situation is certainly possible, as libertarianism believes. If a naval battle does not occur, then it will be found out retroactively that the truth value of the claim is "false", and this has also always been the case, except that until now we did not know about it."
If a naval battle did not occur and it was revealed retrospectively that the value of the claim was false, then it could not have occurred at all because that has been the case since the beginning of time. How does the retrospective clarification solve the problem?
That is, if the physical occurrence of another thousand years determines the truth value of the claim now, what truth value can we attach to the claim if we do not have the information about the occurrence? It can be either true or false, and then what use is the clarification of the retroactive and temporal nature of logic?