Cannot copy param 0 weights from layer 'fc6'

[WangLanxiao]

when I running train_det_model.py，I meet this question:
Cannot copy param 0 weights from layer 'fc6'; shape mismatch. Source param shape is 1024 512 3 3 (4718592); target param shape is 4096 25088 (102760448). To learn this layer's parameters from scratch rather than copying from a saved net, rename the layer.
how can i solve this problem?