Hi,
I found out why this happened...
Cameras made in china for the UK market with a document in Polish stating not to jump versions.
I was on something like 3.1 so would have needed to go 3.2, 3.3, 3.8, 4.0, 4.1, 4.2 (not factual versions but you get the picture).
Dahua are going to send me...