Signature edition and DLC

I bought the Phoenix Point Signature edition in the past (in November 2019) and Season Pack. I finished the game, but I didn’t play for a long time.

Yesterday I want install DLCs (Blood and Titanum, Legacy of The Ancients), but DLCs are disabled and I need buy again.

There exists a new version of the game “Phoenix Point One Year Edition”.

So, am I really need buy a new version if I bought Signature Edition in the past? I’m little confused from that… Unfortunately, EPIC doesn’t offer it - only the upgrade to One Year Edition ;-(