Error while creating contract. Overlapping constraints found.

Error while creating contract. Overlapping constraints found.

Hi all.
I'm trying to renew a customer contract, but when i put the new dates it gives me this error:

Error while creating contract. Overlapping constraints found.

I search activated contracts for this customer and there is no one, so the contract is not duplicated.

I don't know how to solve, please help.



Experience-Movil-Ip
Contract Number :   |   Created On: Thu, 17 Jul 2014 15:57:38 +0200  |  Created By: David Fernandez
Status
: Expired
Valid Till
: Wed, 31 Dec 2014
Contract Name Ex-Movil-Ip    
Account Name xxxxxxx     
Active Period Wed, 1 Jan 2014  -  Wed, 31 Dec 2014    
Total Cost € 0,00    
Description Movil IP 15 users
Attachments -
Products
MOVIL IP  
Services Covered -
Support Plan details
Support Plan
Support Plan
MOVIL IP
Support Type Fixed

Thanks
David


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