Error in version 7.10.9 when I create one task

Hello,
I create one task for a lead, but the system has failured. Is a bug for this version?
The error is:

Mr. Daniele Renna
Create Create
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OVERVIEW OVERVIEW
ACTIONS
Previous (7 of 204) Next
First Name:
Daniele
Last Name:
Renna
Office Phone:
Title:
Procurement & Accounting Manager
Mobile:
Department:
Fax:
Account Name:
Tiscali
Website:
http://
Primary Address:

Other Address:

Email Address:
–None–
Description:
Consorzio Janna
industry:
Telecommunications

MORE INFORMATION
Status:
New
Lead Source:
Linkedln
Status Description:
Lead Source Description:
Opportunity Amount:
Referred By:
Campaign:
OTHER
Assigned to:
Raso
All
Database failure. Please refer to suitecrm.log for details.

Thanks

Can you please have a look at suitecrm.log at the time of that attempt to create the task, and tell us what you find there? Focus on FATAL and ERROR messages.