> I don't really have a solution.

The trick is to be the Oracle of Delphi, not Cassandra.

Make the prediction once, with politeness and humility, and preferably in enough company that your opinion is noted even if (when) it is overridden. Use it as an opportunity to be seen as wise, not just smart.

Then, keep contingency plans. When the problem manifests, have a solution ready as best you can given your limited position. Even when it's too late to avoid the whole problem, you might be able to limit the blast radius. Again, be public but polite about it, and most importantly never say "I told you so" or otherwise appear smug.

You want to cultivate the reputation of "the person who is right but easy to work with, and who always has your back in a pinch."