Error importing folder: pathName already mapped?

Hi All
I am working with Unity 5.0.2 personal version and I have export an unipackage and one extension of it and I got this error

Error importing folder (The pathName [some path] is already mapped to [some hash]. But the meta data wants it to be mapped to [some other hash])

For it, Could anybody help me to fix it?
Thanks in advance
Alejandro Castan

Hi again
Please do not worry about this topic.
I fixed it doing the following in Unity Project

Assets(Right Button) /Reimport All

Thanks anyway
Regards
Alejandro

Watch out about using Reimport All. It will reset all assets, like textures (where you may have adjusted the center points). Apparently you can just ignore the error.