Error when declaring war, even though there shouldn't be

[Emperor Tristar Majestica]

What were you doing (or trying to do): Declare war upon a nation in my war range, who has all his defensive slots open (https://politicsandwar.com/nation/id=43007)

What happened (describe thoroughly please): I clicked "declare", and the game prompted me with the error: 
 
Something went wrong! You've received the following error(s):
That nation, Novosibirsk City-state, is currently involved in 3 defensive wars. Please wait until at least one expires before declaring a new war.

I checked the nation's war activity, and all his 3 previous wars have all expired, and no new ones have been opened. 
 
Link to page: Error message: https://politicsandwar.com/nation/war/declare/id=43007  Nation I'm trying to declare on:  https://politicsandwar.com/nation/id=43007    Their War Activity: â€‹https://politicsandwar.com/nation/id=43007&display=war

Any other relevant information: The nation comes up in my war range with 3 defensive slots available (when hovering above the symbol)
 
 
Screenshot: (if available)
 
Not sure how to insert screenshots...

 

Thanks!

[donsberger]

wars aren't actually expired it is a glitch in the system.

[Alex]

I'll check this out and get it fixed out, thanks for reporting!

[Alex]

Should be all better now - my apologies, a few things I had overlooked when migrating to a more efficient coding scheme for wars.

[Emperor Tristar Majestica]

No worries. Thanks Alex!