How do I fight the Tenant's 30 day notice

[Bryan C.]

Good evening all,  I own a property in Cincinnati that is zoned as Mixed use.  This means that upstairs can be residential but downstairs should be commercial.  The property managers & I know this and they found a tenant who was looking to set up a childcare business at the property.  After 6 months of a 12 month lease the person decides to give a 30 day notice with the excuse that the building department says it was last known as residential and would need zoning hearings which could take 4 months with no guarantee.  

I am looking for some feedback on this one or suggestions on what I can or should do?  This seems like someone is trying to get one by me because I am out-of-state.