"Please enter a valid number for In Speed" when changing manage/status poll for interfaces?

"Please enter a valid number for In Speed" when changing manage/status poll for interfaces?

Hello.  I just had this product given to me and I'm trying to clean up what is monitored and what isn't.  If I go into a Cisco switch interface list and deselect Manage/Status Poll and click save I get Please enter a valid number for In Speed error.  It doesn't say which interface.  All the interfaces other than Unrouted VLAN have a speed value in there, that should be valid.  What am I missing?

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