tensorflow.python.framework.errors_impl.FailedPreconditionError

[Eroslon]

How can i fix this error ?
please help

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import tflearn
import numpy as np
import tensorflow as tf
tf.reset_default_graph()
q_inputs = tf.placeholder(tf.float32, [None, 1, 8])
net, hidden_states_1 = tflearn.lstm(q_inputs, 10, return_seq=True, return_state=True, scope="lstm_1", reuse=False)
q_values = tflearn.lstm(net, 4, return_seq=True, activation='linear', scope="lstm_2", reuse=False)
q_values = tf.stack(q_values, axis=1) # tensor shape(None, n_timesteps, n_actions)
evaluator = tflearn.Evaluator(q_values)
inputs = np.array([[[0, 0, 0, 0, 0, 1, 0, 0]]])
res = evaluator.predict(feed_dict = {q_inputs: inputs})
print(np.argmax(res))

Traceback (most recent call last):
File "D:\Anaconda\envs\py35\lib\site-packages\tensorflow\python\client\session.py", line 1022, in _do_call
return fn(*args)
File "D:\Anaconda\envs\py35\lib\site-packages\tensorflow\python\client\session.py", line 1004, in _run_fn
status, run_metadata)
File "D:\Anaconda\envs\py35\lib\contextlib.py", line 66, in exit
next(self.gen)
File "D:\Anaconda\envs\py35\lib\site-packages\tensorflow\python\framework\errors_impl.py", line 466, in raise_exception_on_not_ok_status
pywrap_tensorflow.TF_GetCode(status))
tensorflow.python.framework.errors_impl.FailedPreconditionError: Attempting to use uninitialized value lstm_2/lstm_2/BasicLSTMCell/Linear/Bias
[[Node: lstm_2/lstm_2/BasicLSTMCell/Linear/Bias/read = IdentityT=DT_FLOAT, _device="/job:localhost/replica:0/task:0/cpu:0"]]