why my bash multidimensional array code is not working? [duplicate]

i am trying to make a multidimaensional array in bash and access the elements. but its not working.

I tried with this code but there's error

# Create an indexed array to hold the inner arrays
    array=()

# Initialize the inner arrays
  array[0]=(1 2 3)
  array[1]=(4 5 6)
  array[2]=(7 8 9)

# Access elements
  element_12="${array[1][2]}"
  echo "Element at [1][2]: $element_12"

# Loop through the elements
    for ((i = 0; i < ${#array[@]}; i++)); do
        inner_array=("${array[i][@]}")  # Copy the inner array
        for ((j = 0; j < ${#inner_array[@]}; j++)); do
            echo "Element at [$i][$j]: ${inner_array[j]}"
       done
   done