That would indicate that the port speed is changing repeatedly which likely means a speed/duplex mismatch for a Cisco device and whatever's connected to it.
You should hard set both devices to 1000 full and that "Spam" that's actually a valid alert will go away.
Alternatively, if you think ignoring devices with bad interface settings is a good idea, you can probably look through your alerts or advanced alerts tab and disable or delete the alert, delete the alert actions that send an email/page, or whatever you prefer.
As Peter has said, this indicates that there is likely a Duplex Mismatch on the interfaces in question, with Orion doing its job of reporting performance issues. This has a big impact on performance and you are best to resolve the duplex settings with a hard set configure at each end.
The following is an excellent article on the subject - http://www.nojitter.com/blog/archives/2010/07/the_killer_dupl.html