I've been running ant deploy all day yesterday on an org of mine with no problems. Before each deployment, I ran an undeploy to delete everything I had deployed previously.
In the middle of the day, I ran into this error while deploying: "objects/Opportunity.object (Opportunity.BillingOrganization__c) -- Error: limit exceeded (line 818, column 13)."
I'm nowhere near hitting any storage limits, nor am I close to hitting any custom field limits. There are no fields available to be undeleted and nothing in the org's recycling bin. I am able to create a custom field manually in my org. I also ran an ant deployment on another org of mine with no problems.
Here is the org's System Overview: http://imgur.com/a/GDXkh
Does anyone know what is going on? Thank you.