glmmTMB & zero values

Hello,
I want to use ( glmmTMB ) function, but I have zero values and I got a code that data should be >0 how can I fix it.
the code is
glmmTMB(CPR~AV +(1|BY2/AV/Sorte/Subplot), dispformula = ~Sorte, data=Standraum, family=beta_family(link="logit"))
Thank you in advance!
Dima