error message: Node inconsistent with parents

[mustfa5]

Hi,

I am trying to run a model but getting an error message. Here is my entire code. Could anyone please help me to understand why I am getting this error message. Thanks in advance

library(R2WinBUGS);
library(R2jags);
library(coda) ;
library(boot);
library(R2jags);

dat<-matrix(c(
6 ,5 , 1 ,1 , 1, 1,
5 ,1 , 1 ,3 , 1, 1,
6 ,5 , 6 ,1 , 1, 1,
6 ,6 , 3 ,1 , 1, 1,
6 ,6 , 6 ,1 , 2, 1,
6 ,6 , 6 ,1 , 1, 1,
6 ,6 , 6 ,6 , 6, 1,
6 ,6 , 6 ,1 , 1, 1,
6 ,6 , 6 ,6 , 6, 5,
6 ,6 , 6 ,1 , 1, 1,
6 ,6 , 1 ,2 , 1, 1,
6 ,6 , 6 ,6 , 4, 1), ncol=6)

N=nrow(dat) #index for rows
I=ncol(dat) #index for columns
rater=c(1,2,3,1,2,3)
item=c(1,1,1,2,2,2)
K <- apply(dat, 2, max)
rater1 <- function() {
for (i in 1:N) {
for (j in 1:I) {
dat[i,j] ~ dcat(prob[i,j,1:K[j]])
}
theta[i] ~ dnorm(0,1)

for(j in 1:I) {
  for(k in 1:(K[j]-1)) {
    logit( P[i,j,k] ) <- theta[i]-B[item[j]] -C[item[j],k]-D[rater[j]]
  }
  P[i, j,K[j]] <- 1
}
for(j in 1:I) {
  prob[i, j, 1] <- P[i, j, 1]
  for (k in 2:(K[j])){
    prob[i, j, k] <- P[i, j, k] - P[i, j, k-1]
  }
}

}
for(j in 1:2) {
B[j] ~ dnorm(0,4)
}
for (j in 1:3) {
D[j] ~ dnorm(0,4)
}
for (j in 1:2) {
for(k in 1:(K[j])) {
C[j,k] ~ dnorm(0,1)
}
}
}
write.model(rater1, con = "rater.bug", digits = 5)
data=list("dat", "N", "I","rater","item", "K")
#R2jugs
rjags=jags(data=data, inits = NULL, n.chains = 1, n.iter = 1500,
n.thin = 1, model.file = "rater.bug", n.burnin = 300,DIC = T,
parameters.to.save=c("B","C","theta","D"))