Marrying my friend and when we turn the server on we are not married to each other anymore?

[Koda8203]

So I am having a problem where I marry my friend we are playing on a aternos server with only minecraft comes alive,Bibliocraft and mr crafish furniture mod. Whenever we get married and leave the game the next day when we start up the server again we are married just not to each other we have to go to a cleric and divorce our spouses and then get re-married does anybody know why this is happening?