Look into zero-inflated model error message

[JHart96]

Chain 1 Informational Message: The current Metropolis proposal is about to be rejected because of the following issue:
Chain 1 Exception: bernoulli_lpmf: Probability parameter is 1.01541, but must be in the interval [0, 1] 
Chain 1 If this warning occurs sporadically, such as for highly constrained variable types like covariance matrices, then the sampler is fine,
Chain 1 but if this warning occurs often then your model may be either severely ill-conditioned or misspecified.