DB Error: Table './ojs_prodution/sessions' is marked as crashed and should be repaired

Stack Trace:

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

File: /var/www/html/lib/pkp/classes/session/SessionManager.inc.php line 168
Function: SessionDAO->getSession("kqvug62g34p8jk9aov708diq07")

File: (unknown) line (unknown)
Function: SessionManager->read("kqvug62g34p8jk9aov708diq07")

File: /var/www/html/lib/pkp/classes/session/SessionManager.inc.php line 59
Function: session_start()

File: /var/www/html/lib/pkp/classes/session/SessionManager.inc.php line 129
Function: SessionManager->SessionManager(Object(SessionDAO), Object(Request))

File: /var/www/html/classes/security/Validation.inc.php line 389
Function: SessionManager->getManager()

File: /var/www/html/lib/pkp/classes/core/PKPPageRouter.inc.php line 66
Function: Validation->isLoggedIn()

File: /var/www/html/lib/pkp/classes/core/Dispatcher.inc.php line 117
Function: PKPPageRouter->isCacheable(Object(Request))

File: /var/www/html/lib/pkp/classes/core/PKPApplication.inc.php line 184
Function: Dispatcher->dispatch(Object(Request))

File: /var/www/html/index.php line 64
Function: PKPApplication->execute()