Letsencrypt with HSTS Domain

Good afternoon,

I have a .dev domain which is preloaded into HSTS.When I try to get a SSL certificate for this Doamin via the Univention app Letsencrypt, I get the following error:

"detail": "Order's status (\"valid\") is not acceptable for finalization",

This seems logical to me, because as far as I know, you have to specify wide parameters for the creation of this certificate, which I unfortunately cannot do.

Does anyone know a solution?

Thanks a lot in advance.