Project Nimbus: CODE MIRAI - Game Code voucher request form
Many users who purchased the old version of Project Nimbus: CODE MIRAI have been reporting issues with upgrading to the new version of the game.
The cause of it seems to be that the old and new versions of Project Nimbus: CODE MIRAI, having different publishers, is being handled by the PlayStation Store as two separate games.

PS4 Issue page

As a solution, we will be handing out game code vouchers for the new GameTomo version of CODE MIRAI to affected users.
Please fill out the form below, and we'll send a free game code your way to redeem the new version of the game!

Please also check your junk/spam folder if you have not received a timely response; we generally try to process voucher requests within a week of receiving them.
Emails containing the voucher code will be sent from hello@gametomo.co.jp