FCPX Event Error - "Element asset does not carry attribute src" ???

Hey everyone,

I have an event that displays the yellow exclamation mark like something is wrong or missing. However, all the media is fine and I cannot find the problem. So, I exported an XML of the event and tried to reimport the XML to see if that would solve the problem and upon import I got the error message stating "Element asset does not carry attribute src".

Does anyone have any idea what this could be or why my event displays a yellow exclamation warning? I would try opening the XML file itself in a text editor or something but I have no idea what to look for. Any help would be greatly appreciated!!