DB Error: Table './web_ojs/sessions' is marked as crashed and last (automatic?) repair failed

Stack Trace:

File: /home/sistemas/vrp/uct/lib/pkp/classes/session/SessionDAO.inc.php line 44
Function: DAO->retrieve("SELECT * FROM sessions WHERE session_id = ?", Array(1))

File: /home/sistemas/vrp/uct/lib/pkp/classes/session/SessionManager.inc.php line 169
Function: SessionDAO->getSession("ip0ptd0ld0fdvaht04j6j2q0q4")

File: (unknown) line (unknown)
Function: SessionManager->read("ip0ptd0ld0fdvaht04j6j2q0q4")

File: /home/sistemas/vrp/uct/lib/pkp/classes/session/SessionManager.inc.php line 60
Function: session_start()

File: /home/sistemas/vrp/uct/lib/pkp/classes/session/SessionManager.inc.php line 130
Function: SessionManager->SessionManager(Object(SessionDAO), Object(Request))

File: /home/sistemas/vrp/uct/classes/security/Validation.inc.php line 379
Function: SessionManager->getManager()

File: /home/sistemas/vrp/uct/lib/pkp/classes/core/PKPPageRouter.inc.php line 66
Function: Validation->isLoggedIn()

File: /home/sistemas/vrp/uct/lib/pkp/classes/core/Dispatcher.inc.php line 117
Function: PKPPageRouter->isCacheable(Object(Request))

File: /home/sistemas/vrp/uct/lib/pkp/classes/core/PKPApplication.inc.php line 178
Function: Dispatcher->dispatch(Object(Request))

File: /home/sistemas/vrp/uct/index.php line 64
Function: PKPApplication->execute()