[Avodah] Passover and Circumcision in the Desert

[Larry Israel]

After the Jews cross the Jordan, Joshua has them circumcised.  He
explains that the babies born in the desert, for forty years, had not
been circumcised.

My question is how the Passover a year after the Exodus was celebrated?
I thought that you could not have uncircumcised boys in the family and
still eat the Paschal sacrifice.  Or was there an exception because the
children could not be circumcised because of the constant possibility of
travel?