need help (Sahara)

[caravel]

Yes, it's based on the early startpos file from MTW v1.x, rather than the one from VI v2.0x.

It looks correct, but not sure why there is a connection to a sea region. You don't need that, so remove the associated neighbours, border info and port position.

It's many years since I enabled Sahara, created/modified provinces, or edited those files. If you do the edit yourself, you must at least set the border info, the "neighbours", origin, attributes, title (governor) and castle position, otherwise the province will be unreachable or the early/high/late campaign won't appear at all due to errors in the file.