Why does the bank ask me to reconnect?
"This isn't us: by law, banks ask for your consent again every 90 to 180 days." Deline shows Your access to … ends on … before it happens and Reconnect … to renew it on the bank's own page.
What about a new PrivatBank or monobank token?
Use Paste a new token on the connected bank. The token must belong to the same account holder; a token for someone else is refused with "This token is for a different account. Connect it as a new bank."
What if I connect the same bank again as a new connection?
Avoid it: use Reconnect instead. If the same payment does end up recorded twice in your books, undo one of them. See Why is a payment counted twice, and how do I stop it?
Explanation written from the Deline app's own screens and texts (build eba146497 (Deline cf723fe1f)); it has no steps to check.