St. Paul in 1 Corinthiaans invented the 'Pauline Priviledge' for marriiages between a Christiaan and a non-believer who did not want to remain 'peaceably' married. He advised divorce on grounds that "God does not call us to live in discord".
In 1 Corinthians it is unclear as to whether he alloowed for re-mrriage. It's just no discussed.

In my own ministry I have asisted a few couples obtain a 'Pauline Priviledge'. It's granted for married people who want to 'make everything right' with Church requirements.