Accepted into a research fellowship program

A super weird thing has happened. I applied for a research fellowship program like that… They sent a mail last week that I wasn’t accepted into the program.
Suddenly this week, they sent another one that they had accepted me and I am running out of time to register.
I was shocked.
I shared the previous mail of rejection with them, they said it was a mistake
This school is offering full scholarship and a role.
Glory be to God