Created Unassigned: Transferring from PS3 to PS4 [1996]

Hi,

I have existing characters on PS4 that I want to transfer items to. I typically play on the PS4, not the PS3.

I have a PS3 and a PS4. I was under the impression I could transfer my character (with the items in tow) from PS3 to PS4, however when I do this it says I will delete my current character.

Is there any way to combine the new character with the old? Or a way to get the items to my current character? Or when I mod like this do I have to start over again every time?

Thanks in advance.