Trtexec --onnx --saveEngine --fp16 error

/usr/src/tensorrt/bin/trtexec --onnx=yolov5m.onnx --shapes=images:1x3x640x640 --fp16    --saveEngine=engine
[09/17/2022-23:41:05] [W] [TRT] Weights [name=Conv_30 + PWN(PWN(Sigmoid_31), Mul_32).weight] had the following issues when converted to FP16:
[09/17/2022-23:41:05] [W] [TRT]  - Subnormal FP16 values detected. 
[09/17/2022-23:41:05] [W] [TRT] If this is not the desired behavior, please modify the weights or retrain with regularization to reduce the magnitude of the weights.
[09/17/2022-23:41:05] [W] [TRT] Weights [name=Conv_30 + PWN(PWN(Sigmoid_31), Mul_32).weight] had the following issues when converted to FP16:
[09/17/2022-23:41:05] [W] [TRT]  - Subnormal FP16 values detected. 
[09/17/2022-23:41:05] [W] [TRT] If this is not the desired behavior, please modify the weights or retrain with regularization to reduce the magnitude of the weights.
[09/17/2022-23:41:05] [W] [TRT] Weights [name=Conv_30 + PWN(PWN(Sigmoid_31), Mul_32).weight] had the following issues when converted to FP16:
[09/17/2022-23:41:05] [W] [TRT]  - Subnormal FP16 values detected. 
[09/17/2022-23:41:05] [W] [TRT] If this is not the desired behavior, please modify the weights or retrain with regularization to reduce the magnitude of the weights.
[09/17/2022-23:41:06] [W] [TRT] Weights [name=Conv_30 + PWN(PWN(Sigmoid_31), Mul_32).weight] had the following issues when converted to FP16:
[09/17/2022-23:41:06] [W] [TRT]  - Subnormal FP16 values detected. 
[09/17/2022-23:41:06] [W] [TRT] If this is not the desired behavior, please modify the weights or retrain with regularization to reduce the magnitude of the weights.

Hi,

These are just some warning messages to let you know the TensorRT handling in case it doesn’t meet your expectation.

Thanks.