Hi @DANIELHIDALGODELGADO,
I consulted a PE who maintains this tool. He would like to share the following:
It is a warning message reporting that the training data and the validation data have different class codes within their boundaries. You can ignore this warning because you can remap the class codes in the training tool.
In the Train Point Classification Model tool > Class Remapping, you can remap class codes 5 and 15 to 1.
If you prefer not to see the warning message, you can use the Change LAS Class Codes tool to change the training data's class codes 5 and 15 to 1.
thanks
Pavan