phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 144 Table './Sql106498_2/phpbb_sessions' is marked as crashed and last (automatic?) repair failed

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('5841819c81a72ca28a85d7d4a7e58a10', -1, 1455032495, 1455032495, '321110b1', -1, 0, 0)

Line : 187
File : sessions.php